inefficient

As adjectives the difference between inefficient and false

is that inefficient is inefficient while false is (label) one of two states of a boolean variable; logic.

As adjectives the difference between heavy and inefficient

is that heavy is (of a physical object) having great weight or heavy can be having the heaves while inefficient is inefficient.

As an adverb heavy

is heavily.

As a noun heavy

is a villain or bad guy; the one responsible for evil or aggressive acts.

As a verb heavy

is to make heavier.

As adjectives the difference between inefficient and undefined

is that inefficient is inefficient while undefined is lacking a definition or value.

As adjectives the difference between inefficient and deficient

is that inefficient is inefficient while deficient is deficient.

As an adjective inefficient

is inefficient.

As a noun null is

zero, nil; the cardinal number before einn.

Unequal is a related term of inefficient.

As adjectives the difference between unequal and inefficient

is that unequal is not the same while inefficient is inefficient.

Incommensurate is a related term of inefficient.

As adjectives the difference between incommensurate and inefficient

is that incommensurate is out of proportion (in size, degree or extent) with something else while inefficient is inefficient.

Inefficient is a related term of futile.

As adjectives the difference between inefficient and futile

is that inefficient is inefficient while futile is incapable of producing results; useless; not successful; not worth attempting.

As adjectives the difference between feasible and inefficient

is that feasible is that can be done in practice while inefficient is inefficient.