dearly
Word family
Synonym discussion
Sense: adverb/1
All three adverbs intensify emotions or states, but they attach to different verb sets. 'Dearly' is the most restricted — it pairs almost exclusively with love, want, wish, and miss, and often carries a gentle, heartfelt tone. 'Deeply' covers a wider emotional range (love, care, regret, concern, hurt) and suggests something profound rather than merely intense. 'Greatly' is the most formal and is used with verbs like admire, appreciate, benefit, and influence. You can say 'I deeply regret the mistake' but not 'I dearly regret the mistake'; you can say 'I greatly appreciate your help' but 'I dearly appreciate your help' would sound odd. In casual speech, 'very much' is the safe all-purpose alternative.
Common collocations
Etymology
From Old English 'dēorlīce', meaning 'in a costly or precious manner'. The word is formed from 'dēore' (meaning 'dear, precious, beloved') and the adverb suffix '-līce' (modern -ly). In early English it referred mainly to costliness or expense; by the 13th century it was already used for emotional attachment ('held dear'). The sense of 'at great cost (in suffering)' emerged by the 16th century. Modern English uses all three threads — financial cost, emotional intensity, and affectionate manner — depending on the verb it modifies.