Third person singular of heft as a verb (he/she hefts), or plural of heft as a noun (multiple lifts or weights).
Regular present tense third-person singular and plural noun formation, showing how the same word can function in multiple grammatical roles through zero morphology or inflectional changes.
Many English words like 'heft' can be both nouns and verbs seamlessly—this flexibility is one reason English is so efficient at expressing new ideas, because we can rapidly repurpose existing words for new grammatical roles.
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