to examine / to collect evidence and prosecute

serving in two dual capacities, serving in two posts concurrently

serve in two jobs or positions of responsibility concurrently, double as A and B

important matter / requirement, necessary condition

(pathology) blood clot; thrombus

to rise up / rainbow / to fall

(obsolete, orthography) Synonym of 半濁点 (handakuten) / (typography) an emphasis point, a dot or similar mark attached to a character to display emphasis

unsettled question

rock paper scissors (popular children's game)

to play rock paper scissors (popular child's game)