defect + -ive

source: I Don't Know When This Defective Junk Will Explode! Anime_irl | Anime Meme on ME.ME

1. imperfect or faulty:

〈機械･製品･体の一部などが〉欠陥のある, 不完全な(faulty)

e.g. complaints over defective goods.

lacking or deficient:

«…が» 不足している «in» .

e.g. dystrophin is commonly defective in muscle tissue.

Grammar (of a word) not having all the inflections normal for the part of speech.

2. (also mentally defective) dated or offensive having mental disabilities.

｟古･けなして｠ 〈知能などが〉障害のある

noun (also mental defective) dated or offensive

a person with mental disabilities.

｟古･けなして｠ (知的)障害者

defectively |dəˈfektivlē| adverb

defectiveness |dəˈfektivnəs| noun