nibbling
The word 'nibbling' is a noun form, a gerund, the present participle of the verb to nibble which functions as a noun.The word 'nibble' is both a noun (nibble, nibbles) and a verb (nibble, nibbles, nibbling, nibbled).The noun forms of the verb to nibble are nibbler and the gerund, nibbling.
Getting is the present participle of get.
The present participle is doing.
Being is the present participle. The past participle is been.
Presenting is the present participle of present.
Presenting is the present participle of present.
The present participle is choosing.
The present participle is walking.
The present participle is cleaning.
The present participle is seeking.
The present participle of "understand" is "understanding."
The present participle is putting.