感染を防ぐには手洗いが一番

N1 感染 kansen infection, contagion N3 防ぐ fusegu to defend (against), to protect, to prevent N2 手洗い tearai restroom, lavatory N5 一番 ichiban first, best, most

N3 感 kan emotion, feeling, sensation N1 染 sen / so.meru, so.maru, shi.miru, shi.mi dye, color, paint N2 防 bou / fuse.gu ward off, defend, protect N4 手 shu, zu / te, te-, -te, ta- hand, main, mano N3 洗 sen / ara.u wash, inquire into, probe N5 一 ichi, itsu / hito-, hito.tsu one, one radical (no.1), un N3 番 ban / tsuga.i turn, number in a series, tour (de rôle)

N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information