slack

As an adjective flimsy

is likely to bend or break under pressure; weak, shaky, flexible, or fragile.

As a noun flimsy

is thin typing paper used to make multiple copies.

As a verb slack is

.

Quiescent is a related term of slack.

As an adjective quiescent

is inactive, at rest, quiet.

As a verb slack is

.

Forgetful is a related term of slack.

As an adjective forgetful

is unable to remember things well; liable to forget.

As a verb slack is

.

Inexact is a related term of slack.

As an adjective inexact

is imperfectly conforming; exceeding or falling short in some respect.

As a verb slack is

.

Unexcited is a related term of slack.

As an adjective unexcited

is (nonstandard) not excited.

As a verb slack is

.

Motionless is a related term of slack.

As an adjective motionless

is at rest, stationary, immobile, not moving.

As a verb slack is

.

Lackadaisical is a related term of slack.

As an adjective lackadaisical

is showing no interest or enthusiasm.

As a verb slack is

.

Neglectful is a related term of slack.

As an adjective neglectful

is tending to neglect; failing to take care of matters which require attention.

As a verb slack is

.

As adjectives the difference between slack and undutiful

is that slack is lax; not tense; not hard drawn; not firmly extended while undutiful is not dutiful.

As a noun slack

is small coal; coal dust.

As an adverb slack

is slackly.

As a verb slack

is to slacken.

As verbs the difference between play and slack

is that play is (lb) to act in a manner such that one has fun; to engage in activities expressly for the purpose of recreation or entertainment while slack is .

As a noun play

is activity for amusement only, especially among the young.