• 除外じょがい — exclusion
• 削除さくじょ — deletion
• 解除かいじょ — cancellation, release
• 免除めんじょ — exemption

除 combines the radical 阝(こざとへん), often associated with places or steps, and the phonetic 余. Originally it referred to clearing away something in a space, and now it broadly means to remove or exclude.

不要ふようなファイルを 削除さくじょしてください。
Please delete unnecessary files.

学生がくせいは 授業料じゅぎょうりょうが 免除めんじょされました。
The student was exempt from tuition fees.

除 is read as ジョ in on-yomi and のぞく in kun-yomi. The kun reading appears in casual or descriptive settings, while the on reading is common in compound words.