Meanings

cerebral peduncle

semi-presidential system

large notebook (usu. used for taking lecture notes)

ōnamazu (giant catfish thought to cause earthquakes)

far-reaching amendment

dried cannabis

double extra-large

(an) adult their age (should, should not, etc.)

to take good care of

being greatly in the red

former president

extended real number

ominelite

large storage space

massive response

handling things like an adult

large dictionary

supermassive black hole

great enthusiasm

great debate