A proverb meaning it's better to ask and be embarrassed once than to not ask and be ignorant (shamed) forever — encouraging people to ask questions.
授業で分からないところがあったら、問うは一度の恥、問わぬは末代の恥だと言って先生に質問しなさい。
If you don't understand something in class, remember the proverb 'better to ask and be embarrassed than not ask and never know' — ask the teacher.
仕事で迷ったら、先輩に聞くのが一番だ。問うは一度の恥、問わぬは末代の恥だからね。
If you're unsure at work, it's best to ask a senior. Better to ask and be embarrassed than not to ask and be ignorant forever.