adverb
Adverbial intensifier used with adjectives and verbs; can express both positive and negative extremes.
今日は大変暑いですね。
It's awfully hot today, isn't it?
大変お世話になりました
Thank you very much for your help.
na-adjective, noun
serious; grave; immense; terrible
Describes a situation, problem, or degree that is extreme, severe, or of great magnitude. Often used in warnings or expressions of concern.
それは大変な問題だ。
That's a serious problem.
大変なことになった。
Things have gotten really bad.
na-adjective, noun
Used when something requires great effort or is physically/mentally demanding; often in the pattern ～は大変だ.
毎日料理をするのは大変だ。
Cooking every day is hard work.
子育ては大変だけど楽しい。
Raising children is tough but enjoyable.
noun
Archaic noun meaning a calamity or great event; rarely used in modern Japanese outside historical or literary contexts.
古文書には「大変」を災いの意で用いた例がある。
In old documents, 大変 is sometimes used to mean a disaster.