incompetent

As adjectives the difference between ineffectual and incompetent

is that ineffectual is unable or insufficient to produce effect; futile while incompetent is unskilled, lacking normally expected degree of ability.

As a noun incompetent is

a person who is incompetent.

Hollow is a related term of incompetent.

As adjectives the difference between hollow and incompetent

is that hollow is (of something solid) having an empty space or cavity inside while incompetent is incompetent.

As an adverb hollow

is (colloquial) completely, as part of the phrase beat hollow or beat all hollow.

As a noun hollow

is a small valley between mountains; a low spot surrounded by elevations.

As a verb hollow

is to make a hole in something; to excavate (transitive) or hollow can be to urge or call by shouting; to hollo.

As an interjection hollow

is .

As adjectives the difference between unsuccessful and incompetent

is that unsuccessful is failed, not successful while incompetent is unskilled, lacking normally expected degree of ability.

As a noun incompetent is

a person who is incompetent.

Abortive is a related term of incompetent.

As adjectives the difference between abortive and incompetent

is that abortive is (obsolete) produced by abortion; born prematurely while incompetent is incompetent.

As a noun abortive

is (obsolete) that which is born or brought forth prematurely; an abortion .

As a verb abortive

is (obsolete) to cause an abortion; to render without fruit .

Nugatory is a related term of incompetent.

As adjectives the difference between nugatory and incompetent

is that nugatory is trivial, trifling or of little importance while incompetent is incompetent.

As adjectives the difference between unfruitful and incompetent

is that unfruitful is of or pertaining to not bearing fruit (usually figuratively) while incompetent is unskilled, lacking normally expected degree of ability.

As a noun incompetent is

a person who is incompetent.

As adjectives the difference between incompetent and uncapable

is that incompetent is incompetent while uncapable is (obsolete) not capable; incapable.

Empty is a related term of incompetent.

As adjectives the difference between empty and incompetent

is that empty is devoid of content; containing nothing or nobody; vacant while incompetent is incompetent.

As a verb empty

is (ergative) to make empty; to void; to remove the contents of.

As a noun empty

is a container, especially a bottle, whose contents have been used up, leaving it empty .

As adjectives the difference between unskilled and incompetent

is that unskilled is of a person or workforce: not having a skill or technical training while incompetent is unskilled, lacking normally expected degree of ability.

As a noun incompetent is

a person who is incompetent.

As adjectives the difference between incompetent and unqualified

is that incompetent is unskilled, lacking normally expected degree of ability while unqualified is not qualified, ineligible, unfit for a position or task.

As a noun incompetent

is a person who is incompetent.