the condition of being stretched; the force used; something that tests one's mental strength; a great demand on one's strength etc
pain, due to exertion
Cases of word usage
1) to tax (a person, business etc) too heavily; to put too much strain on (something) (overtax)
2) the state, degree, of being tight; (a feeling, condition of) mental, emotional or nervous strain between people, groups, states etc (tension)
3) to behave in a way free from strain or formality (unbend)
