Suffix - meaning ulous

Answer 1

The suffix -ulous is added to adjectives, usually English words originally from Latin, to denote 'habitually' or 'inclined to', such as garrulous (talkative); credulous (easily fooled); incredulous (not easily fooled).

The term fabulous is an exception: it comes into English from the Latin fabulosus, fabled, in the sense of incredible. A good example of why one should check etymology before assuming what the origin of a word might be.

Answer 2

the suffix ulous means to tend to. as in tending to her every will.