Skill set is actually two words. The plural is skill sets.
The plural form is skills.
Skill is singular, skills is plural. You can have one skill or you can have many skills.
The word skill is a noun. The plural form is skills. Skill can also be a verb meaning to set apart.
Yes, "skills" is a plural noun. It refers to a collection of abilities or proficiencies possessed by an individual.
Criteria is the plural of the world criterion. Criteria are guidelines or standards for testing something. For example, a criterion for working as a chef would be culinary skill.
A phrase that uses coupled with is a modification that does not convert a singular noun into a plural noun, so if you say something such as, originality coupled with skill makes him an interesting musician, originality remains singular.
The plural form is skills.
Skilful (UK spelling) / skillful (US spelling) is not an adverb, no.Skilful/skillful is actually an adjective.The adverb form is Skilfully (UK) / skillfully(US).
Yes, it is, as in skilled workmen. It is related to the noun skill, and means having skills or talents.
The word 'sports' is a noun, the plural form for the noun sport; a common, abstract noun. The noun sports is a word for activities involving physical exertion and skill in which an individual or team competes against another or others.
The noun 'skills' is the plural form of the singular noun 'skill'.The noun 'skill' is a countable or a mass noun depending on use.The noun 'skill' (skills) is a countable noun as a word for a particular ability that involves special training and experience.All people have a number of different skills. How many skills? It depends on the individual.The noun 'skill' is an mass noun (uncountable noun) as a word for an ability to do something well; expertise; a word for a concept.