1640s, from Latin instinct-, past participle stem of instinguere "to incite, impel" (see instinct) + -ive. Related: Instinctively (1610s); instinctiveness. Coleridge uses instinctivity.
offering to help was as instinctive as breathing
instigation
instigator
instill
instillation
instinct
instinctive
instinctual
institute
institution
institutional
institutionalization
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