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safe; secure; sound; problem-free; without fear; all right; alright; OK; okay
certainly; surely; undoubtedly
no thanks; I'm good; that's alright
「大丈夫」 has another reading with different meanings.
大丈夫、心配しないで。
It's fine, don't worry.
大丈夫、彼なら必ず合格する。
No worries — he'll surely pass.
明日までに届けば大丈夫です。
It'll be fine as long as it arrives by tomorrow.