painstaking
B2CEFR level
35/100Rarity: fairly common
NeutralRegister
Done with or requiring careful, thorough and laborious effort.
The mosaic was reassembled through the painstaking sorting of some forty thousand fragments.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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