I. noun Date: 1538 the action of taking pains ; diligent care and effort, II. adjective Date: 1696 taking pains ; expending, showing, or involving diligent care and effort, ~ly adverb
PAINSTAKING
Meaning of PAINSTAKING in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012