Hah

A representation of laughter.

"Ha, ha, ha! That’s funny."

An exclamation of triumph or discovery.

"Ha! Checkmate!"

An exclamation of grief.

A sound of hesitation: er, um.

Said when making a vigorous attack.

(with falling pitch) used to express amusement or subtle surprise.

"Huh! I'm sure I locked it when I left."

Used to express doubt or confusion.

"Huh? Where did they go?"

(with rising pitch) Used to reinforce a question.

"Where were you last night? Huh?"

(with falling pitch) Used either to belittle the issuer of a statement/question, or sarcastically to indicate utter agreement, and that the statement being responded to is an extreme understatement. The intonation is changed to distinguish between the two meanings - implied dullness for belittlement, and feigned surprise for utter agreement.

"(agreement) A: "Murder is bad." B: "Huh!""