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undecidable▼◼◼◼adjective
undefinable▼◼◻◻adjective[UK: ˌʌn.dɪ.ˈfaɪ.nəb.l̩] [US: ˌʌn.dɪ.ˈfaɪ.nəb.l̩]
unresolvable▼adjective
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