• 課題かだい — assignment, issue
• 課長かちょう — section chief
• 日課にっか — daily routine
• 学課がっか — school subject
• 課税かぜい — taxation
• 考課こうか — evaluation

The radical 言 (ごんべん) shows the relation to speech or text, and the character conveys the idea of dividing and assigning tasks or lessons. It’s used both in administrative settings and education.

Words like 課題かだい (assignment) and 課税かぜい (taxation) show its wide application in structured or regulated activities.

今日きょうの課題かだいは 三さんつあります。
There are three assignments for today.

彼かれは 営業課えいぎょうかに 勤つとめています。
He works in the sales department.

The on-yomi “カ” is used in almost all contexts with this kanji, especially in formal or organizational words. Whether in 課題かだい (task) or 課長かちょう (section chief), this kanji emphasizes structured division.