useless

As a contraction youre

is (informal|nonstandard).

As an adjective useless is

without use or possibility to be used.

As adjectives the difference between usable and useless

is that usable is capable of being used while useless is without use or possibility to be used.

Vacant is a related term of useless.

As adjectives the difference between vacant and useless

is that vacant is not occupied; empty while useless is without use or possibility to be used.

Useless is a related term of unsatisfactory.

As adjectives the difference between useless and unsatisfactory

is that useless is without use or possibility to be used while unsatisfactory is inadequate, substandard or not satisfactory.

As adjectives the difference between wasted and useless

is that wasted is not profitably used while useless is without use or possibility to be used.

As a verb wasted

is past tense of waste.

Useless is a related term of dull.

As adjectives the difference between useless and dull

is that useless is without use or possibility to be used while dull is lacking the ability to cut easily; not sharp.

As a verb dull is

to render dull; to remove or blunt an edge or something that was sharp.

Useless is a related term of trifling.

As adjectives the difference between useless and trifling

is that useless is without use or possibility to be used while trifling is trivial, or of little importance.

As a noun trifling is

the act of one who trifles; frivolous behaviour.

Specious is a related term of useless.

As adjectives the difference between specious and useless

is that specious is seemingly well-reasoned, plausible or true, but actually fallacious while useless is without use or possibility to be used.