manipulation (as in a device) / manipulation (as in a person): deception, taking someone in / getting on someone's right side; humoring someone; an effort to please someone

mechanism / machine / airplane / opportunity

kanji not approved for regular use

excavator

a vacuum cleaner

Kyūjitai form of 機会 (“opportunity”).

transmission, gearbox (mechanical assembly of gears that changes the torque and speed of shaft rotations)

Clipping of 電子計算機 (denshi keisanki): computer

a traffic light

state affairs