Unscramble

o 1 p 3 e 1 r 1 o 1 s 1 e 1 n 1 e 1 s 1 s 1

11 letters · 13 points in Scrabble

Meaning

noun the quality of requiring extended effort

originFrom operose + -ness.

Etymology from Wiktionary, CC BY-SA 3.0

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