noun

alacrity

eagerness, willingness, readiness

She accepted the invitation with alacrity.

She accepted the invitation with alacrity.

((with alacrity)) with brisk and cheerful readiness She accepted the invitation with alacrity.

Synonyms: eagerness, readiness, enthusiasm, promptness; Antonyms: reluctance, apathy, hesitation

From Latin 'alacritās', from 'alacer' meaning 'brisk, cheerful, lively'.

It sounds a bit like 'a lack of pity', but it means the opposite of being slow or hesitant. Imagine someone acting with cheerful speed.

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