Hiatus is a Latin word meaning opening, gap or rupture
I can only think of one stem in the word "concussion" which is "con". Con means together.
The stem word in "significant" is "signific." This is the root form of the word before any suffixes are added.
Polis doesn't have any wors stems! polis is actually a word stem itself polis means city. for example police has polis in it as a word stem!
Some words that have the root "clam" in them include clamor, exclaim, and proclamation.
Ecosystem, stemware, systematic.
hiatus
Not every word has a base word. Some words are considered base words themselves and do not stem from any other word.
Hiatus
hiatus
(The word hiatus refers to a gap or temporary cessation. In medical situations, it refers to a discontinuity, such as "hiatal hernia." It can refer to a sabbatical break.)"When it began to require too much effort, he took a hiatus from his coin collecting hobby.""When the hiatus in the conversation became embarrassingly long, I decided to start serving the sandwiches.""While on hiatus from the university, the professor wrote a book on economics."
A stem morpheme is a linguistic unit that carries the core meaning of a word and is combined with other morphemes to create different word forms. It serves as the base to which affixes can be attached to form new words or change the meaning of the stem.