strain

(physics) deformation of a physical body under the action of applied forces

difficulty that causes worry or emotional tension; "she endured the stresses and strains of life"; "he presided over the economy during the period of the greatest stress and danger"- R.J.Samuelson

a succession of notes forming a distinctive sequence; "she was humming an air from Beethoven"

a special variety of domesticated animals within a species; "he experimented on a particular breed of white rats"; "he created a new strain of sheep"

(biology) a group of organisms within a species that differ in trivial ways from similar groups; "a new strain of microorganisms"

the general meaning or substance of an utterance; "although I disagreed with him I could follow the tenor of his argument"

an effortful attempt to attain a goal

the act of singing; "with a shout and a song they marched up to the gates"

to exert much effort or energy; "straining our ears to hear"

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"

separate by passing through a sieve or other straining device to separate out coarser elements; "sift the flour"

cause to be tense and uneasy or nervous or anxious; "he got a phone call from his lawyer that tensed him up"

become stretched or tense or taut; "the bodybuilder's neck muscles tensed;" "the rope strained when the weight was attached"

remove by passing through a filter; "filter out the impurities"

alter the shape of (something) by stress; "His body was deformed by leprosy"