Present participle of greaten; the process of making something great or greater.
From greaten plus the present participle suffix -ing. Creates a gerund or continuous aspect form of the verb.
This word perfectly demonstrates how English verbs can be conjugated through different forms, but most speakers would say 'making great' or 'becoming greater' instead of using 'greatening'—the language chose simpler paths!
Complete word intelligence in one call. Free tier — 50 lookups/day.