lackadaisical

As a verb relax

is to calm down.

As an adjective lackadaisical is

showing no interest or enthusiasm.

As a verb lack

is .

As an adjective lackadaisical is

showing no interest or enthusiasm.

As adjectives the difference between childish and lackadaisical

is that childish is of or suitable for a child while lackadaisical is showing no interest or enthusiasm.

As a noun apathy

is complete lack of emotion or motivation about a person, activity, or object; depression; lack of interest or enthusiasm; disinterest.

As an adjective lackadaisical is

showing no interest or enthusiasm.

As adjectives the difference between lackadaisical and uncaring

is that lackadaisical is showing no interest or enthusiasm while uncaring is characterized by a lack of care; not caring.

Lackadaisical is a related term of inexact.

As adjectives the difference between lackadaisical and inexact

is that lackadaisical is showing no interest or enthusiasm while inexact is imperfectly conforming; exceeding or falling short in some respect.

Thoughtless is a related term of lackadaisical.

As adjectives the difference between thoughtless and lackadaisical

is that thoughtless is marked by or showing lack of due thought or care; careless while lackadaisical is showing no interest or enthusiasm.

Lackadaisical is a related term of disorderly.

As adjectives the difference between lackadaisical and disorderly

is that lackadaisical is showing no interest or enthusiasm while disorderly is not in order; marked by disorder or disarray.

Unconcerned is a related term of lackadaisical.

As adjectives the difference between unconcerned and lackadaisical

is that unconcerned is indifferent and having no interest; aloof while lackadaisical is showing no interest or enthusiasm.

As adjectives the difference between nonchalant and lackadaisical

is that nonchalant is casually calm and relaxed while lackadaisical is showing no interest or enthusiasm.