lax lax /ˈlæks/

adjective

1. () Lacking in rigor or strictness  ( slack , lax )
   lacking in rigor or strictness
    Such lax and slipshod ways are no longer acceptable
   such lax and slipshod ways are no longer acceptable
    Lax in attending classes
   lax in attending classes
    Slack in maintaining discipline
   slack in maintaining discipline
   
2. Emptying easily or excessively  ( lax , loose )
   emptying easily or excessively
    Loose bowels
   loose bowels
   
3. Lacking in firmness or tension; not taut  ( lax )
   lacking in firmness or tension; not taut
    A lax rope
   a lax rope
   
4. (phonetics) pronounced with muscles of the tongue and jaw relatively relaxed (e.g., the vowel sound in 'bet')  ( lax )
   (phonetics) pronounced with muscles of the tongue and jaw relatively relaxed (e.g., the vowel sound in 'bet')