Lax

1. Lenient and allowing for deviation; not strict.
2. Loose; not tight or taut.
3. Lacking care; neglectful, negligent.
4. (archaic) Having a looseness of the bowels; diarrheal.
5. (mathematics) Describing an associativemonoidal functor.

Synonyms

• (lenient, not strict): permissive, lenient
• (loose, not tight): loose, slack
• (lacking care): blameworthy, lash, negligent, remiss, reprehensible

Antonyms

• (lenient, not strict): strict
• (loose, not tight): taut, tight