All proficient antonyms

adj proficient

• impotent — not potent; lacking power or ability.
• incapable — not capable.
• incompetent — not competent; lacking qualification or ability; incapable: an incompetent candidate.
• unable — lacking the necessary power, competence, etc., to accomplish some specified act: He was unable to swim.
• unskilled — of or relating to workers who lack technical training or skill.
• unskillful — not skillful; clumsy or bungling.
• ignorant — lacking in knowledge or training; unlearned: an ignorant man.
• immature — not mature, ripe, developed, perfected, etc.
• inexperienced — not experienced; lacking knowledge, skill, or wisdom gained from experience.
• inefficient — not efficient; unable to effect or achieve the desired result with reasonable economy of means.
• clumsy — A clumsy person moves or handles things in a careless, awkward way, often so that things are knocked over or broken.
• inept — without skill or aptitude for a particular task or assignment; maladroit: He is inept at mechanical tasks. She is inept at dealing with people.
• green — of the color of growing foliage, between yellow and blue in the spectrum: green leaves.
• untalented — having talent or special ability; gifted.