このまま放置すると大きな事故になる恐れがある

N5 この kono this N1 放置 houchi leave as is, leave alone, neglect N4 すると suru to then, when that happens N5 大きな ookina big, large N4 事故 jiko accident, incident N5 なる naru become, turn into, happen N1 恐れ osore fear, horror

N3 放 hou / hana.su, -ppana.shi, hana.tsu, hana.reru, ko.ku, hou.ru set free, release, fire N3 置 chi / o.ku, -o.ki placement, put, set N5 大 dai, tai / oo-, oo.kii, -oo.ini large, big, grand N4 事 ji, zu / koto, tsuka.u, tsuka.eru matter, thing, fact N1 故 ko / yue, furu.i, moto happenstance, especially, intentionally N3 恐 kyou / oso.reru, oso.ru, oso.roshii, kowa.i, kowa.garu fear, dread, awe

N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜と to Indicates company, quotation, natural condition, complete list, or direct connection between elements N5 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase