きっと

きっと expresses the speaker's strong confidence that something will happen or is true.

DEGREES OF CERTAINTY:

• きっと: surely, definitely (~90% confidence)
• たぶん: probably (~70% confidence)
• もしかしたら: perhaps, maybe (~30% confidence)

COMMON PATTERNS:

• きっと〜だろう: surely ~ (with conjecture)
• きっと〜と思(おも)う: I'm sure that ~
• きっと〜はず: surely must be ~
• きっと大丈夫(だいじょうぶ): I'm sure it'll be fine

USAGE:
Often used to encourage or reassure others. Works with both positive and negative predictions. Usually written in hiragana.

NOTE:
きっと expresses the speaker's subjective confidence. For objective certainty, use 必(かなら)ず (without fail) or 確(たし)かに (certainly).