Lax

1. adjective

   pronounced with muscles of the tongue and jaw relatively relaxed (e.g., the vowel sound in `bet')

2. adjective

   lacking in strength or firmness or resilience

   “a lax rope”

3. adjective

   lacking in rigor or strictness

   “such lax and slipshod ways are no longer acceptable”

   Similar: slack

4. adjective

   emptying easily or excessively

   “loose bowels”

   Similar: loose