Definition of strain oneself
1 : to injure oneself by making one's muscles do too much work Don't strain yourself trying to move the couch.
2 : to put a lot of physical or mental effort into doing something Don't strain yourself trying to think of the answer. I can tell you what it is.
Word by Word Definitions
: lineage, ancestry
: a group of presumed common ancestry with clear-cut physiological but usually not morphological distinctions
: a specified infraspecific group (such as a stock, line, or ecotype)
: to draw tight : cause to fit firmly
: to stretch to maximum extension and tautness
: to exert (oneself, one's senses, etc.) to the utmost
: one's normal, healthy, or sane condition or self
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