valgla tähendus null.

basin [basins]▼◼◼◼noun
[UK: ˈbeɪs.n̩] [US: ˈbeɪs.n̩]

watershed [watersheds]▼◼◻◻noun
[UK: ˈwɔː.tə.ʃed] [US: ˈwɑː.tər.ˌʃed]