IPA: /ˌɪrɪˈzɒl.juːtnəs/
KK: /ˌɪrɪˈzɒl.juːt.nəs/
The condition of being uncertain or indecisive about something.
Her irresoluteness made it difficult for her to make a decision about the job offer.
Irresoluteness → It is formed from "ir-" (meaning not), "resolutus" (from Latin, meaning resolved or determined), and "-ness" (a suffix indicating a state or quality). The word describes the state of being not resolved or lacking determination.
Think of 'not' ('ir-') being combined with 'resolved' ('resolutus') to remember that 'irresoluteness' means a lack of resolution or determination.