まじで

まじで comes from 真面目(まじめ) (serious) + で. It's one of the most common casual intensifiers in modern Japanese.

Register

This is casual/colloquial language popular among younger speakers. In formal contexts, use 本当(ほんとう)に or 真剣(しんけん)に.

Forms

• まじ: shortened form
• マジで: written in katakana for emphasis
• まじか: "seriously?" (question form)

Common patterns

• まじで～: seriously (intensifier)
• まじで!?: seriously!? (surprise)
• まじか: really? seriously?