ぬる
塗る(ぬる)、塗料(とりょう)
to paint, paint/coating
On-reading (ト) is used in compounds; kun-reading (ぬ(る)) is used standalone or with okurigana. Has multiple meanings (paint; plaster; smear). Context determines which applies — pay attention in reading passages. This kanji forms verbs/adjectives with okurigana. Practice both the word form and compound forms.
JLP Quiz の問題から。実際に出題される形で確かめられます。
その発見___、科学の歴史が大きく塗り替えられた。
答え: を境として