The present participle of 'disleaf'; the ongoing process of removing leaves.
From 'disleaf' + '-ing' suffix (Old English '-ung'), which creates the gerund or present participle form indicating an action in progress.
The '-ing' suffix is one of English's most productive suffixes, turning any verb into a noun or continuous action—'disleafing' could describe autumn stripping trees, or someone deliberately removing foliage from a plant.
Complete word intelligence in one call. Free tier — 50 lookups/day.