defective

adjectives

having a defect
"I returned the appliance because it was defective"
defective, faulty
is derived from
defectiveness
markedly subnormal in structure or function or intelligence or behavior
"defective speech"
defective
is similar to
not normal; not typical or usual or regular or conforming to a norm
"abnormal powers of concentration"; "abnormal amounts of rain"; "abnormal circumstances"; "an abnormal interest in food"
abnormal, unnatural
not working properly
"a bad telephone connection"; "a defective appliance"
bad, defective
is derived from
defectiveness