Kupil
Kupil is the transliteration used in English-language texts for the Cyrillic word купил, which is the masculine singular past tense form of купить (to buy). It appears in Russian-language sentences to indicate that a male subject performed the action of buying in the past.
Usage and form: Kupil marks a completed purchase by a masculine subject. For example, Он купил книгу сегодня means “He
Morphology and tense: Kupil is the past tense form of купить. In Russian, perfective verbs use past
Etymology and notes: The form derives from the verb root куп- with the past-tense suffix -ил. In transliterated
Cross-linguistic context: Similar past-tense forms exist in related languages, but with different spellings. Ukrainian uses купив (kupiv)