lax

lacking in rigor or strictness; "such lax and slipshod ways are no longer acceptable"; "lax in attending classes"; "slack in maintaining discipline"

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

lacking in strength or firmness or resilience; "a lax rope"; "a limp handshake"

emptying easily or excessively; "loose bowels"