だらしない

だ

ら

し

な

い

Common wordJLPTN3

Meanings

1

i-adjective

Critical adjective for untidy appearance, sloppy work, or lax self-control in areas such as money, time, or habits.

ひと

と

は

一いっ

緒しょ

に

住す

み

にくい

。

It is hard to live with someone who is careless with money.

2

i-adjective

Reproachful use for someone who lacks resolve, gives in too easily, or seems weak; often sounds like a scolding.

だらしないUsage100%
Normal practical spelling; the kana reading has high priority; the only kanji form is search-only.
だらし無ないUsage<1%
search-only kanji form
Attested mixed kanji form marked as search-only; ordinary writing normally uses だらしない.

ずぼら
Also describes a careless or sloppy person, but ずぼら more strongly suggests laziness or neglect as a personal trait.
みっともない
Means shameful or unsightly from an outside view; だらしない focuses more on lack of neatness, discipline, or self-control.
いい加か減げん
Can mean irresponsible, half-hearted, or careless; だらしない is more specifically untidy, lax, or lacking self-discipline.

The historical derivation of だらし is uncertain. The spelling だらし無い transparently writes the final ない as 無い, but the ordinary modern spelling is kana.