Present participle of disjoin; the act of separating or disconnecting things.
From disjoin + -ing. The -ing suffix creates the present participle, showing an ongoing or continuous action.
The -ing form is almost magical in English—it can be a verb form ('We are disjoining the parts'), a noun ('Disjoining takes time'), or even an adjective ('the disjoining process')—one ending serves three grammatical functions.
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