The Tocharian B word ompostäṃ
Word ompostäṃ
o m p o s t ə ṃ
IPA ompostəṃ
Meaning afterwards

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

Other words that might be of interest
ente ‘when’, pikul ‘year’, postäṃ ‘after’, ṣek ‘always’, śāśvat ‘everlasting’, manta ‘never’, ṣe-keś ‘once only’