maintenance

a person's nature or disposition / original characteristic of a thing; a property; a nature

physics (as an area of study)

physical object; object; body

(physics) inertia

maintain, keep

speed; velocity / (physics) velocity

to call; to call out / to call, to apply a name to someone / to send for someone, to call for someone, to get someone / to call something by a name; to designate / to invite

passive of 呼ぶ (yobu) [godan]

to be treated to (a meal)