Describes a blade or cutting edge that has lost its sharpness. Often used metaphorically for a person's dullness or lack of sharpness.
lazy; cowardly; good-for-nothing
Used to criticize a person as lacking spirit, energy, or courage; implies a dull, sluggish character. Often derogatory.
This kitchen knife is so blunt it can't even cut a tomato.
I can't leave work to such a good-for-nothing guy.
Don't say such cowardly things.
切れ味 is good when a blade cuts cleanly, whereas なまくら describes a dull, blunt blade that fails to cut well.
Usually written in kana; the kanji forms 鈍ら and 鈍 are rare and may be unfamiliar.
Rare kanji spelling; easily confused with 鈍 (にぶい) or 鈍 (どん).
Rare kanji spelling; the okurigana ら is sometimes used to distinguish from 鈍 (なまくら).
The origin is uncertain. Possibly from 鈍 (なま) meaning 'dull' and an emphatic suffix くら, but the exact derivation is unclear.