What does the suffix -ulous mean?

The suffix "-ulous" generally means "full of", "abounding in", or "characterized by". It implies a quality or characteristic that is present in abundance or to a notable degree.

Here are some examples:

* Fabulous: full of wonder, amazing

* Grateful: full of gratitude, thankful

* Humorous: full of humor, funny

* Jealous: full of jealousy, envious

* Scrupulous: full of care and concern for detail, meticulous

* Vigorous: full of energy and strength, lively

It's important to note that "-ulous" is not always used literally, and its meaning can sometimes be more figurative or metaphorical. For instance, "ridiculous" doesn't necessarily mean "full of ridicule," but rather "absurd" or "silly."