poor — having little or no money, goods, or other means of support: a poor family living on welfare.
bad — If you say that it is bad that something happens, you mean it is unacceptable, unfortunate, or wrong.
common — If something is common, it is found in large numbers or it happens often.
crude — A crude method or measurement is not exact or detailed, but may be useful or correct in a rough, general way.
detestable — If you say that someone or something is detestable, you mean you dislike them very much.
ignorant — lacking in knowledge or training; unlearned: an ignorant man.
inferior — lower in station, rank, degree, or grade (often followed by to): a rank inferior to colonel.
insignificant — unimportant, trifling, or petty: Omit the insignificant details.
ordinary — of no special quality or interest; commonplace; unexceptional: One novel is brilliant, the other is decidedly ordinary; an ordinary person.
regular — usual; normal; customary: to put something in its regular place.
repulsive — causing repugnance or aversion: a repulsive mask.
ugly — very unattractive or unpleasant to look at; offensive to the sense of beauty; displeasing in appearance.
unable — lacking the necessary power, competence, etc., to accomplish some specified act: He was unable to swim.
unexceptional — not exceptional; not unusual or extraordinary.
unknown — not known; not within the range of one's knowledge, experience, or understanding; strange; unfamiliar.
unskilled — of or relating to workers who lack technical training or skill.
failing — Slang. an embarrassing or humorous mistake, humiliating situation, etc., that is subject to ridicule and given an exaggerated importance: Their app update is a massive fail. the condition or quality resulting from having failed in this way: His online post is full of fail. a person who fails in this way.
imperfect — not perfect; lacking completeness: imperfect knowledge.
