Dictionary / Vocabulary / 当然
とうぜん
natural; right; proper; just
common word Also written 当前
当然ですが先生は英仏語とも理解できますけれど。
Obviously the teacher can understand both English and French.
「隆ちゃん見えな~い~」「目隠ししてるんだから当然だ」
"Ryu, I can't seeee!" "Naturally, that's because I'm covering your eyes."
当然よ、抜き打ちなんだもの。
Why of course, that's what the "surprise" means.