'ascared' originates from English, specifically formed from the prefix 'a-' plus the past participle 'scared' of the verb 'scare', where 'a-' is an adjectival/colloquial prefix and 'scared' derives from the verb 'scare'.

'ascared' developed as a regional/colloquial compound from the past participle 'scared' (from the verb 'scare') in dialectal English varieties (for example Appalachian and some rural British dialects), eventually being used as an independent adjective 'ascared' in those varieties.

Initially built from the meaning of 'scare' (to frighten), it evolved in dialectal use into an adjective meaning 'afraid' when someone says they are 'ascared'.