The word 'engineering' can be used as an adjective, ex: an engineering project.
No, it is a verb or a noun (to go around, to surround; a round shape). The adjective form is circular.
Adjective.
peeked a adjective or verb
Engineering may be used as a noun or verb. It is a noun when referring to a particular subject, e.g. "I will be studying Engineering at university next year" or "That is a fine piece of engineering." It is a verb when used to describe an action, such as "He was busy at his work table, engineering a new oart for the motor." It could also, disputedly, be used as an adjective, to describe an "Engineering degree", but theoretically, even in this instance, 'engineering' forms part of the total noun "degree".
No, it is an adjective. Breathe is a verb, breathing is a verb too... but then breathable is an adjective, which makes unbreathable an adjective.
It's an adjective.
Restless is an adjective. Restless is not a verb.
Verb: to fascinate Adjective: fascinating
verb of brave?
penetrate is an adjective
"No" is usually an interjection or an adjective, but never a verb!