Present participle of disqualify; the process of declaring someone ineligible; acting as a reason for ineligibility.
From disqualify + -ing (present participle marker, from Old English). The -ing form allows the verb to function as a gerund or participle.
The -ing form is one of English's most versatile—'disqualifying factors' can be a noun phrase, 'he is disqualifying her' is continuous action, and 'disqualifying is unfair' makes it an abstract noun, all with one form!
Complete word intelligence in one call. Free tier — 50 lookups/day.