Habit converted into an adjective?
The adjective form of the noun 'habit' is habitual.
The word 'fond' is an adjective. An adverb is a word that modifies a verb, adjective or another adverb. Like many adjectives, 'fond' can be converted into an adverb by adding 'ly' to make 'fondly'. Examples: "I have fond memories of my youth." ('fond' used as an attributive adjective) "I am fond of you." ('fond' used as a predicative adjective)