baggage, luggage / unwelcome burden

a gangway or accommodation ladder for boarding or leaving a ship or aircraft

an airplane, aeroplane / (obsolete) Clipping of 空中飛行機 (kūchū hikōki): a flying machine

to use / to employ / to make use of, to apply / to spend

pile up

conjunctive form of 積む (tsumu) [godan]

a paper aeroplane

use one thing for many purposes / work someone hard

to use one's head

(informal) the act of leaving a book unread after buying it, typically piled up together with other such unread books