とろい

i-adjective

dull; stupid; thickheaded

Describes a person who is slow-witted, dim, or not sharp mentally. Often used in casual, mildly derogatory contexts.

• あいつはとろいから、説せつ明めいしてもわからないよ。

  He's so thickheaded that he won't get it even if you explain.

i-adjective

slow; sluggish

Refers to slow movement, reaction, or progress. Can apply to people, actions, or processes.

• 彼かれは仕し事ごとがとろい。

  He is slow at his work.

• このパソコン、動うごきがとろいな。

  This computer is sluggish.