Need

必要

hitsuyō

(something required)

...が必要

...ga hitsuyō

(to have an absolute requirement for)

しなければいけない

shinakereba ikenai

(to be obliged to)

必要する

hitsuyōto-surú

(to have an absolute requirement for)

義務がある

gimu ga aru

(to be obliged to)

要る

iru

(to have an absolute requirement for)

要る

iru

(to want strongly)