Ha
来自Big Physics
natural utterance: first recorded in Middle English.
wiktionary
ha
Attested early 14th century [1], of onomatopoeic origin. Compare Danish ha, Dutch ha, Finnish ha, Hungarian ha, Latin ha, Latvian ha, Swedish ha.
Onomatopoeic.
etymonline
ha (interj.)
natural expression of surprise, distress, etc.; early 14c., found in most European languages (including Latin and Old French) but not in Old English (which did, however, have ha-ha).
