IPA: //ˌʌn.əˈspɪə.reɪ.tɪd//
KK: /ʌnˈæspəˌreɪtɪd/
Describing a sound that is produced without a burst of breath or aspiration.
In phonetics, the letter 'p' can be pronounced as unaspirated in some languages, meaning it is said without a strong puff of air.
Unaspirated → It is formed from "un-" (meaning not) and "aspirated" (from Latin "aspirare", meaning to breathe or blow). The word describes a sound that is not accompanied by a breathy or explosive sound, indicating a lack of aspiration.
Think of 'not' ('un-') having a 'breath' ('aspirare') — that's why unaspirated means a sound without that breathy quality.