しまる
閉まる(しまる)、閉じる(とじる)
to close, to close/shut
On-reading (ヘイ) is used in compounds; kun-reading (し(まる)) is used standalone or with okurigana. 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。