used
Word family
Synonym discussion
Sense: verb/1
All three describe past actions or situations, but they differ in usage and scope. 'Used to' is the most common and versatile: it works for both repeated actions ('I used to visit my grandmother every Sunday') and past states ('She used to live in Tokyo'). 'Would' can only describe repeated actions, not states — you can say 'He would often call me late at night' but NOT 'He would live in Tokyo'. 'Was accustomed to' is more formal and emphasizes familiarity from habit rather than the action itself; it pairs naturally with a time frame ('After two years in the army, he was accustomed to waking at dawn'). For everyday learner use, 'used to' is the safest choice for past habits, while 'would' adds a literary or nostalgic tone for repeated events.
Common collocations
Etymology
The word 'used' comes from the past participle of the verb 'use', which entered English from Old French 'user' (to employ, make use of), tracing back to Latin 'usus', the past participle of 'uti' (to use, enjoy, experience). The past-habit meaning ('used to') developed in English around the 16th century from the idea of being accustomed to doing something through repeated practice. The adjective sense 'second-hand' (adj/3) emerged in the 19th century as a natural extension of something that has already been 'used' by someone else.