IPA: /ɪmˈpruːdəns/
KK: /ɪmˈpruːdəns/
A lack of caution or good judgment in making decisions, often leading to risky or unwise actions.
His imprudence in investing all his savings in a single stock cost him dearly.
Imprudence is formed from "im-" (meaning not) and "prudentia" (from Latin, meaning foresight or wisdom). The word describes a lack of foresight or wisdom in decision-making.
Think of 'not' ('im-') being wise or having foresight ('prudentia') — that's why imprudence means a lack of wisdom in actions.