IPA: /ˌʌn.rɪˈflɛk.tɪv/
KK: /ʌnˈrɛflɛktɪv/
Not thinking deeply or carefully about something; lacking thoughtfulness or consideration.
His unreflective response showed that he hadn't considered the consequences of his actions.
Unreflective → It is formed from "un-" (meaning not) and "reflective" (from Latin "reflectere", meaning to bend back or turn back). The word describes a state of not bending back or turning back one's thoughts, indicating a lack of deep thought or consideration.
Think of 'not' ('un-') being combined with 'bending back' ('reflective') — this helps you remember that unreflective means not thinking deeply or critically.