Fastness
//ˈfɑːs(t)nəs//
Pronunciation
US //ˈfɑːs(t)nəs//
US //ˈfæs(t)-//
US //ˈfæs(t)nəs//
US //ˈfɑːs(t)nəs//
US
Syllables: 2
Phonemes: F AE1 S T N AH0 S
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.