(taxonomy, of a characteristic) Distinguishing an organism or taxon from others that share the same ancestor / (taxonomy, of a taxon) Distinguished by such characteristics

(dated) Clipping of sophister (“student advanced beyond first year of residence”).

The state of being dogged; persistence; perseverance; tenacity; stubbornness. / (obsolete) sullenness; moroseness

A belt (a band or strap) worn around the waist, especially when part of a larger article, such as a backpack.