Having force; characterized by or exerting force; powerful or forceful in nature or action.
From force + -ive (adjective suffix meaning 'having the nature of'). A rare but valid formation following English patterns for creating adjectives from nouns.
While 'forceful' won the competition to describe power in English, 'forcive' survives in technical vocabulary—a reminder that sometimes the best word loses to the catchier alternative.
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