IPA: /ˌʌn.dɪˈvaɪ.dɪd/
KK: /ʌnˈdɪvaɪdɪd/
Not separated or divided; remaining whole and complete.
She gave her undivided attention to the lecture.
Undivided → It is formed from "un-" (meaning not) and "dividere" (meaning to divide). The word "undivided" means not divided or whole, indicating something that remains intact or unified.
Think of 'not' ('un-') being added to 'divide' ('dividere') — this helps you remember that 'undivided' means something that is whole and not split.