na-adjective, noun
Obsolete term for careless, sloppy, or poorly done work. Not used in modern Japanese; replaced by words like ぞんざい or いい加減.
古文書には「疎慢な仕事」という表現が見られる。
In old documents, the expression '疎慢な仕事' (slipshod work) can be found.
The exact derivation is uncertain; the kanji 疎 (neglect) and 慢 (lazy) suggest a meaning of careless or negligent behavior.