Czech words with long ú or ů
Both ú and ů are long /uː/. Same sound, different spelling: ú at word start, ů elsewhere.
ú appears at word start (úkol "task"); ů appears mid- or end-of-word (dům "house"). The kroužek (little ring) on ů is a historical spelling marker — it doesn't change the sound.
10 phrases in the library contain this sound. Tap any to hear native audio, see the IPA, and (optionally) record yourself for a per-phoneme score.