decern
To decide or determine (a matter disputed or doubtful), with simple object, with infinitive or object clause, or intransitive.
obsolete, transitive
To decree (something) by judicial sentence. — To decree by judicial sentence that something be done.
intransitive, transitive
To decree (something) by judicial sentence. — To decree a person etc. to be or to do something by judicial sentence. (in the phrase “to decern in”, obsolete) To mulct in by decree of court.
intransitive, transitive
He purſued Andrew Houſtoun upon his promiſe, to give him the like Sallary for the next year, and in abſence obtained him to be holden as confeſt and Decerned.
To discern; to distinguish or separate by differences (things that differ, or one thing from another).
obsolete, transitive
Where it comes from
First attested in late Middle English circa 1425; from the French décerner, from the Latin dēcernō (“to decide, pronounce a decision”), from dē (“of, from, away from”) + cernō (“to separate, distinguish”), whence the English cern. In Old French, the forms of décerner were frequently conflated with those of descerner, discerner; the two verbs were not clearly distinguished until the 16th century; hence, in English also, decern is found with the sense discern.
Adapted from the Wiktionary entry decern (CC BY-SA 4.0).