entrust *someone with [a matter] / give *someone charge of [a matter] / commission *someone / give a commission to *someone

introduce a culture into

naturalize

naturalize

be diffident / be hesitant / be timid

holding / support / sustaining / retaining / supporting / retain / keeping *something going / keep / keeping *something up / sustainment / maintenance / hold / maintaining / keeping / hold *something up / preserve / keep *something up / preservation / maintain / sustain / retainment / preserving / keep *something going

keep / <<patient>> hold on / pull through / endure / hang on / stand / live through / hold out

<<patient>>hold on / keep / pull through / endure / hang on / stand / live through / hold out

keep / <<patient>> hold on / pull through / endure / hang on / stand / live through / hold out

be obstinate / be stubborn