Cautious IS an adjective. An adjective is an action!
The word "it" is not an adjective (it is a pronoun). A word is an adjective if it modifies (defines, characterizes) a noun or pronoun. The big tent - big is an adjective He is tall - tall is an adjective This key - this (while arguably called a determiner) is a demonstrative adjective
Severe is an adjective.
Hard is an adjective.
adjective
yes
Studying
Although used as a singular term, the typical form of some scientific disciplines employs the adjective form followed by an S. Examples : adjective linguistic / study linguistics adjective kinetic / study kinetics adjective dynamic / study dynamics
Study
adverb phrase
The proper adjective for Christ is "Christological," as it relates to the study of Christ's nature, teachings, and significance in Christianity.
The prepositional phrase "in the study hall procedures" is usually an adverbial rather than an adjective phrase, because the substance of the phrase is a description of "where" something is. Example as an adverbial phrase: "A rule against loud talking can be found in the study hall procedures." A possible example as an adjective phrase: "A rule in the study hall procedures forbids loud talking."
adverb phrase
SPARSEST (according to Study Island Tests)
The word 'scholarly' is the adjective form for the noun scholar.The noun form for the adjective scholarly is scholarliness.
No the word study can be a verb and a noun.
The participles of the verb to study are studied and studying, but have no adverb forms.For persons who study, there is the derivative adjective studious, with the adverb studiously.