highly
Word family
Synonym discussion
Sense: adverb/1
'Very' is the most general and common intensifier in English and can be used before almost any adjective or adverb ('very tired', 'very quickly'). 'Highly' is more restricted — it pairs naturally with adjectives that describe degree, quality, or probability ('highly effective', 'highly likely') and with past participles ('highly recommended'). It sounds more formal than 'very' and is often preferred in professional or academic contexts. 'Extremely' is stronger than both 'very' and 'highly', suggesting a level that goes far beyond the ordinary ('extremely dangerous', 'extremely valuable'). 'Greatly' is closest to 'highly' in formality but is used mostly with past participles expressing emotional or quantitative change ('greatly improved', 'greatly appreciated'). For example: you would say 'I am very happy' (not *'highly happy'), 'the chemicals are extremely dangerous' (emphasizing danger beyond usual), and 'your help is greatly appreciated' (the standard polite formula).
Common collocations
Adverbs
- quite highly
- very highly
- so highly
Prepositions
- highly of (used with speak/think)
Etymology
Formed in Middle English from the adjective 'high' (going back to Old English 'hēah', meaning 'tall' or 'lofty') plus the adverbial suffix '-ly' (from Old English '-līce'). The intensifier meaning — 'to a great degree' — developed early, appearing in Old English texts for both literal height and figurative intensity. The specialized senses of expressing admiration (sense 2) and high rank (sense 3) became established by the 16th century.