solidify

solidify — verb

1. to become hard and firm after being in a liquid or soft state — for example, whe

1.verbtransitive / intransitiveB2
Definition

to become hard and firm after being in a liquid or soft state — for example, when melted butter cools on a countertop and returns to a solid state, it solidifies.

Example

The melted wax began to solidify as it cooled on the kitchen counter.

intransitive: substance solidifies on its own

Theo poured the hot caramel into a tray and let it solidify overnight.

Common collocations
  • molten metal
  • melted wax
  • cooling lava
  • cement
  • concrete
  • jelly
  • fat
  • grease
Synonyms
  • harden

    more general; can apply to non-liquids (e.g. bread hardens)

  • congeal

    suggests a semi-solid, sticky result; often used for blood, fat, or sauces

  • set

    common for glue, jelly, cement; implies reaching a final firm state

  • freeze

    specifically refers to liquid becoming solid through cold temperature

Antonyms
  • melt

    to change from solid to liquid through heat

  • liquefy

    to become liquid, often through chemical or physical processes

  • dissolve

    to mix with a liquid and become part of it

Grammar Patterns

solidify (into + noun)

solidify + noun

Usage Note

Both transitive and intransitive. When used transitively, the subject is typically a cooling force, a chemical agent, or a natural process (e.g. cold, time, a chemical reaction). The object is usually a liquid, gas, or molten substance. For water turning to ice, 'freeze' is more natural than 'solidify'.

Common Mistakes

The water in the freezer solidified into ice.
The water in the freezer froze into ice.
'solidify' describes substances becoming hard (wax, cement, jelly); use 'freeze' specifically for water becoming ice.

2. to give a plan, idea, relationship, or agreement a firmer, more permanent qualit

2.verbtransitive / intransitiveB2
Definition

to give a plan, idea, relationship, or agreement a firmer, more permanent quality so that it no longer feels temporary or uncertain — for example, winning an important contract can solidify a company's position in the market.

Example

The two countries signed a treaty to solidify their trade relationship.

transitive: solidify + abstract noun (relationship)

Arjun's success in the competition solidified his decision to become a professional musician.

solidify + decision (abstract noun)

Common collocations
  • position
  • relationship
  • support
  • reputation
  • alliance
  • partnership
  • plan
  • control
  • status
  • hold on power
Synonyms
  • strengthen

    broader; can be physical or abstract; less specific about permanence

  • consolidate

    implies bringing separate parts together into a stronger whole

  • reinforce

    suggests adding extra support to something that already exists

  • entrench

    stronger and often negative; suggests something becomes fixed and hard to remove

Antonyms
  • weaken

    to make less strong or less certain

  • undermine

    to gradually make something less secure or effective

  • erode

    to slowly destroy or reduce something over time

Grammar Patterns

solidify + abstract_noun

solidify into + noun

Usage Note

Commonly used with abstract nouns such as 'plan', 'idea', 'relationship', 'position', 'support', 'reputation', 'alliance', or 'partnership'. Frequently transitive in business, political, and personal-development contexts. The intransitive form ('their partnership solidified over time') describes a gradual process.

Common Mistakes

The team solidified their victory with a late goal.
The team secured their victory with a late goal.
'solidify' works best for ongoing positions, relationships, or status; use 'secure' for a single achievement like a win.

Word family

  • solid
    adjectiveB1
  • solidly
    adverbB2
  • solidity
    nounC1
  • solidification
    nounC1
  • consolidate
    verbB2
  • consolidation
    nounC1

Synonym discussion

Sense: verb/2

All four words describe making something stronger, but they differ in scope and tone. 'Strengthen' is the most general — you can strengthen a muscle, an argument, or a relationship through many different actions. 'Solidify' adds the idea of moving from a liquid, unstable state to a fixed, firm one, which makes it especially natural for abstract things that were uncertain or fluid (e.g., 'solidify a plan'). 'Consolidate' implies bringing separate pieces together into a unified whole — a company consolidates its departments, or a leader consolidates power. 'Reinforce' suggests adding extra support to something that already exists, like reinforcing a wall or an idea with new evidence. 'Entrench' is the strongest and often carries a negative tone; it means fixing something so deeply that it becomes hard to remove, as in 'entrenched beliefs' or 'entrenched bureaucracy.' Choose 'solidify' when the image is of something taking shape from a more fluid or uncertain starting point.

strengthen ↗consolidate ↗reinforce ↗entrench

Common collocations

Nouns

Adverbs

Phrases

  • solidify around
  • solidify over time

Prepositions

Etymology

LatinFrenchEnglish

Formed in English by combining 'solid' (from Latin 'solidus' meaning firm, whole, not hollow) with the suffix '-ify' (from Latin '-ficare' meaning to make or cause). The word first appeared in the early 19th century. The physical sense ('become solid') is the original; the figurative sense ('make certain') developed soon after as a natural extension of the image of something becoming firm and fixed.