尽先

尽先	jǐn xiān	in the first instance / as a first priority
尽	jǐn	to the greatest extent / (when used before a noun of location) furthest or extreme / to be within the limits of / to give priority to
尽	jìn	to use up / to exhaust / to end / to finish / to the utmost / exhausted / finished / to the limit (of sth) / all / entirely
先	xiān	beforehand; first; earlier / at first; originally / for the time being; for now / (prefix) my late (in referring to deceased relatives older than oneself)