adverb
Used at the beginning of a conditional clause, often paired with ～たら, ～ば, or ～なら. Marks a hypothetical or uncertain situation.
もし雨が降ったら、試合は中止です。
If it rains, the game will be canceled.
もしよろしければ、ご一緒にいかがですか。
If you don't mind, how about joining us?