do-gooder

UK: /ˌduːˈguːdə^r/ US: /ˈduˈgʊdɚ/ ,(do̅o̅′gŏŏd′ər, -gŏŏd′-)

WordReference Random House Learner's Dictionary of American English © 2025

do-good•er /ˈduˈgʊdɚ/   n. [countable]

1. a person who has good intentions but is too unknowing and whose help has no effect.

WordReference Random House Unabridged Dictionary of American English © 2025

do-good•er  (do̅o̅′gŏŏd′ər, -gŏŏd′-), n. 

1. a well-intentioned but naive and often ineffectual social or political reformer.

• do good + -er¹ 1925–30, American.

Collins Concise English Dictionary © HarperCollins Publishers::

do-gooder noun

1. a well-intentioned person, esp a naive or impractical one

ˌdo-ˈgoodery noun

ˌdo-ˈgooding noun , adjective