The root of the word.
The root.
Root
the portion of a word that contains its basic meaning.
Somatic is a word containing the Greek root "soma-", meaning body.
Aged. Agism. Agist.
perpetual
Words similar in meaning to "encompasses" are "includes", "surrounds", and "contains".
Graph is the part of the word that contains the Greek root meaning "write."
Root.
I think ethos could be the word
Earliest, basic, fundamental, primal, original...
fundamental principle
the portion of a word that contains its basic meaning.
fundamental principle
The word part "in-" means "not" or "without." It is often used as a negative prefix to indicate the absence or opposite of something.
The fundamental meaning of "yoyo", a type of toy, is a noun. Various metaphorical uses of the word are mostly nouns also, but most English nouns can also be used as "substantive adjectives".
The 'Root" contain the essential, basic meaning of the word. It is the fundamental portion of that word. The suffixes are attached to make the root more specific, and the prefixes are attached at the beginning of a root to make also more specific.
Somatic is a word containing the Greek root "soma-", meaning body.
The word contain is a verb (to contain).