IPA: /ˌʌn.əˈkæd.ə.mɪ.kli/
KK: /ʌnˌækəˈdɛmɪkli/
In a manner that is not related to academic standards or practices.
He approached the topic unacademically, focusing more on personal experience than research.
Unacademically → It is formed from "un-" (meaning not) and "academic" (from Latin "academicus", meaning pertaining to an academy or scholarly). The suffix "-ly" (meaning in a manner) indicates the manner of being not academic. Thus, "unacademically" means in a manner that is not scholarly or academic.
Think of 'not' ('un-') being applied to 'academic' — this helps you remember that 'unacademically' means doing something in a way that is not scholarly.