exert + -ion

source: [次元が違う・・・！！｜無料GIF画像検索 GIFMAGAZINE 3882670]

1. physical or mental effort:

努力, 尽力 (!effortよりも骨の折れる努力; → effort) ; 激しい活動

e.g. she was panting with the exertion

e.g. a well-earned rest after their mental exertions.

2. the application of a force, influence, or quality:

(権力などの)行使, 発揮

e.g. the exertion of authority.