適当 [てきとう] is a rare case of a word that can mean somethi | Learn Japanese

適当 [てきとう] is a rare case of a word that can mean something, and something that is opposite of its other meaning

it can mean "appropriate" or suitable"

and it can also mean something like "sloppy", "careless", or "careless"

for example

適当な語で空所を満たせ [てきとうごくしょをみたせ]

means "fill the blanks with approriate/suitable words"

and

適当なことを言う [てきとうなことをいう] means "make irresponsible comments" or colloquially "talk out of one's ass"