ineffable is a valid English word

Scrabble validity: valid ( international - Sowpods, US - Twl06 )
iScramble validity: valid
QuickWords validity: valid

Meanings

Adjective (NOT COMPARABLE)

Beyond expression in words; unspeakable. (from 1450)
• Synonym: indescribable, inexpressible, unspeakable, Thesaurus:indescribable, Thesaurus:incomprehensible
Forbidden to be uttered; taboo.
• Synonym: taboo, unspeakable, unutterable

ineffable is a Scrabble valid word

i1n1e1f4f4a1b3l1e1

• International English (Sowpods) - The word is valid in Scrabble ✔
• US English (TWL06) - The word is valid in Scrabble ✔
• 17 points

ineffable is an iScramble, QuickWords valid word

i1n2e3f4f5a6b7l8e9

• The word is valid in iScramble ✔
• The word is valid in QuickWords ✔
• 45 points

Same letters words (Anagrams)

• none

Same letters plus one

• AFFEEBLING

Same letters minus one

• FINEABLE
• FINELEAF