No, it is not. Gender is a noun (male-female classification).
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Gender: a subclass within a grammatical class (as noun, pronoun, adjective, or verb) of a language that is partly arbitrary but also partly based on distinguishable characteristics (as shape, social rank, manner of existence, or sex) and that determines agreement with and selection of other words or grammatical forms
'Would everyone please bring their computers to the writing shop.'The antecedent is the indefinite pronoun 'everyone', a word that takes the place of an unknown or unnamed number and gender of people; the pronoun 'their' (a possessive adjective) represents any number and gender of people.That is the agreement, an unknown number and gender.
The antonym of the noun 'gender' is genderlessness, a word for the state of having no gender.
Cautious IS an adjective. An adjective is an action!
The person and number do not indicate gender, the noun antecedent determines gender. For example:When George got to 19th Street, he got off the train. (the noun George indicates use of the male personal pronoun)Aunt Mary made her lemon cake for the party. (the noun Aunt Mary indicates use of the female adjective pronoun)The house needs a lot of work, it has a bad roof. (the noun house indicates use of the neuter personal pronoun)