imperfect

(noun) a tense of verbs used in describing action that is on-going. Synonyms: progressive, progressive tense, imperfect tense, continuous tense.

(adj) not perfect; defective or inadequate. Synonyms: imperfect (vs. perfect). Examples: "Had only an imperfect understanding of his responsibilities." "Imperfect mortals." "Drainage here is imperfect."

(adj) wanting in moral strength, courage, or will; having the attributes of man as opposed to e.g. divine beings. Synonyms: fallible, frail, weak. Examples: "I'm only a fallible human." "Frail humanity."