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v.
pass from physical life and lose all bodily attributes and functions necessary to sustain life; "She died from cancer"; "The children perished in the fire"; "The patient went peacefully"; "The old guy kicked the bucket at the age of 102"
v.
use to the utmost; exert vigorously or to full capacity; "He really extended himself when he climbed Kilimanjaro"; "Don't strain your mind too much"