必死になって

ひっしになって

desperately, for one's dear life

必

ひつ

definiteness, certainty

必殺

ひっさつ

bringing certain death, deadly, knockout (blow)

必見

ひっけん

must-see, not to be missed, a must

必食

ひっしょく

must-eat

必治

ひっち

certain cure

必衰

ひっすい

bound to decline, decay, or collapse

必置

ひっち

mandatory requirements (e.g. qualifications, administrative structures, etc.)

必罰

ひつばつ

inevitability of punishment

必着

ひっちゃく

must arrive, must be received

必定

ひつじょう

inevitably, certainly

必須

ひっす ひっしゅ ひっすう

indispensable, required

必需

ひつじゅ

necessary

必中

ひっちゅう

hitting the target

必達

ひったつ

certain fulfilment

必読

ひつどく

must-read, obligatory reading

必聴

ひっちょう

must-listen

必要

ひつよう

necessary, needed, essential, indispensable

必ず

かならず

always, without exception, necessarily, certainly, without fail, positively, invariably