avert
Word family
- aversionnounC1
- averseadjectiveC1
- aversiveadjectiveC2
Synonym discussion
Sense: verb/1
All five verbs describe stopping something unwanted, but they differ in tone and timing. 'Prevent' is the everyday, neutral choice and works in any register: 'wash your hands to prevent illness'. 'Avert' is more formal and almost always suggests a last-minute rescue from a bad outcome, often a serious one like a crash, war, or strike. 'Avoid' is broader: you can avoid a person, a topic, or a situation by staying away from it, not necessarily by stopping it. 'Forestall' is very formal and stresses moving first, often to block someone else's likely action ('the company forestalled a takeover bid'). 'Stave off' is more informal and pictures pushing something back temporarily — hunger, sleep, bankruptcy. Compare: 'The pilot averted a crash' (dramatic rescue) vs 'Regular checks prevent crashes' (routine safeguard) vs 'The pilot avoided bad weather' (steered around it).
Common collocations
Etymology
'Avert' came into English in the late 1300s from Old French 'avertir', which itself came from Latin 'avertere', formed from 'ab-' (away) plus 'vertere' (to turn). The literal Latin idea — 'to turn away' — survives clearly in the modern sense of averting one's eyes, while the figurative sense of turning danger away gave rise to the meaning of preventing a bad event. The Latin root 'vertere' is the same one behind English words like 'reverse', 'convert', and 'version'.