The Tocharian B word manta
Word manta
m ɐ n t ɐ
IPA mɐntɐ
Meaning never

Comments
Douglas Q. Adams, “Etymological Dictionary of Tocharian B”, 1999, Brill

Other words that might be of interest
ente ‘when’, pikul ‘year’, ompostäṃ ‘afterwards’, postäṃ ‘after’, ṣek ‘always’, śāśvat ‘everlasting’, ṣe-keś ‘once only’