intracerebral; intracranial; the inside of the head / (figuratively) the inside of one's mind; within one's mind; mental (of imagined things, etc.)

(neuroanatomy) rhinencephalon

brain damage

(Internet slang) person who inflames public anxiety and/or fear with groundless information about radioactivity.

(slang) meathead; dumb muscle; someone that often uses physical strength without thinking

a cerebral lobe

(slang) endorphin or adrenaline

subarachnoid hemorrhage

Synonym of 黄昏 (tasogare, “dusk; twilight”) / Synonym of 黄昏時 (tasogaredoki, “dusk; twilight”)

cerebrospinal fluid