IPA: /ʌnˈtaɪərɪŋli/
KK: /ʌnˈtaɪərɪŋli/
In a way that shows great effort and persistence without getting tired.
She worked untiringly to complete the project on time.
Untiringly → It is formed from the prefix 'un-' (meaning not) and 'tiring' (from the root 'tire', which comes from Old French 'tirer', meaning to pull or draw). The suffix '-ly' (meaning in a manner of) indicates the manner of the action. Thus, 'untiringly' means to do something in a manner that is not tiring or exhausting.
Think of 'not tiring' ('un-') and doing something in a way that is 'full of energy' ('tiring') — that's how you remember that 'untiringly' means to do something without getting tired.