use, usage, utilization, application / exploitation, taking advantage of

machine; machinery

lever

Principle. / A fundamental truth that bases on. / An eternal law that is common over lots of fact. / (philosophy) A basic fact which explains why something exists.

use, utilize / exploit, take advantage of

器械: a device, an appliance, a mechanism / 機械: a machine, equipment, an apparatus / 器械: a utensil, a tool, an instrument / 器械: a tool for conducting a test or experiment or for measurement

to never go back on one's decision no matter what

(religion) fundamentalism

user

recycling / reuse