IPA: /ˌʌn.kəˈlɛk.tə.bəl/
KK: /ʌnˈkɒlɛktəbl/
Something that cannot be collected or recovered, often referring to debts or payments that are unlikely to be received.
The company had to write off several uncollectible accounts from their financial records.
Uncollectible → It is formed from "un-" (meaning not) and "collectible" (from Latin "collectus", meaning gathered or assembled). The word means something that cannot be gathered or collected, typically referring to debts that cannot be recovered.
Think of 'not' ('un-') being added to 'gathered' ('collectible') — this helps you remember that 'uncollectible' refers to something that cannot be gathered or collected.