～中（～じゅう）— within; by the end of
今日 中 に 帰ります。
I’ll be home by the end of today.
～中～じゅう
within; by the end of
～じゅう
accent [1]In detail
Words
今日kyōtoday
中nakaby the end of (the period)
にni(time marker)
帰りますkaerimasureturn home (polite)
Kanji
中チュウ・
中 read じゅう can set the limit of a time period. 今日中に means “by the end of today.” In other expressions, じゅう can mean throughout a place or period.
Coco-sensei