No, it's an adverb. The adjective form is simply rapid.
The word rapidly is an adjective. no
"Aging" can either be an adjective (as in, "an aging person") or a gerund (as in, "The person was aging rapidly").
Yes. Here are some examples: Rapidly running water (Rapidly is an adverb modifying "running" which is a present participle used as an adjective) Very rapidly running water (very is an adverb modifying "rapidly"). Completely bald (the adverb completely modifies the adjective bald) Almost completely bald (the adverb almost modifies the adverb completely)
No. Mushroom is a noun, or a verb (to rapidly grow or to billow).
rapidly is an adverb. adjectives are words that describe a noun. You can't say, like, the chair is very rapidly. Adverbs are words that describe verbs. You can say, he ran rapidly across the room.
The word 'rapidly' is an adverb, a word that modifies a verb, an adjective, or another adverb. Example:The boy rapidly ran to catch the ball before it could hit the ground.
The form "most active" is the superlative form of the adjective "active."The comparative is more active.For the adjectives less and slower, the superlatives are least and slowest. The superlative adjective form of the adverb more rapidly would be most rapid.
Yes, it is an adverb. It is the adverb form of the adjective speedy. It means quickly or rapidly.
In most cases where an adverb ends in LY (or -ally), you can remove that suffix to obtain an adjective. E.g. ominously -> ominous, rapidly -> rapid
The word "your" is a possessive adjective (used twice). The word "a" is an article. The word "rapidly" is an adverb modifying the adjective approaching. The present participle "approaching" is used as an adjective modifying the noun truck. The word "straight" is used as an adverb modifying the participle headed in the adjective phrase "headed straight for your car."
most active
The word "fast" can be an adjective (speedy) or an adverb (speedily). Other adverbs that mean fast are quickly, rapidly, and expeditiously.