confused (adj.)

early 14c., "discomfited, routed, defeated" (of groups), serving at first as an alternative past participle of confound, as Latin confusus was the past participle of confundere "to pour together, mix, mingle; to join together;" hence, figuratively, "to throw into disorder; to trouble, disturb, upset."

The Latin past participle also was used as an adjective, with reference to mental states, "troubled, embarrassed," and this passed into Old French as confus "dejected, downcast, undone, defeated, discomfited in mind or feeling," which passed to Middle English as confus (14c.; for example Chaucer's "I am so confus, that I may not seye"), which then was assimilated to the English past-participle pattern by addition of -ed. By mid-16c., the word evolved a back-formed verb in confuse. Few English etymologies are more confusing. 

Of individuals, "discomfited in mind, perplexed," from mid-14c.; in logic, "indistinct, indistinguishable from other ideas from which it ought to be different," 1610s. Meaning "lacking orderly arrangement of parts" is from 1776. Related: Confusedly.

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Definitions of confused

confused (adj.)
perplexed by many conflicting situations or statements; filled with bewilderment;
bewildered and confused
Synonyms: baffled / befuddled / bemused / bewildered / confounded / lost / mazed / mixed-up / at sea
confused (adj.)
lacking orderly continuity;
a confused set of instructions
a confused dream about the end of the world
Synonyms: disconnected / disjointed / disordered / garbled / illogical / scattered / unconnected
confused (adj.)
having lost your bearings; confused as to time or place or personal identity;
Synonyms: disoriented / lost
confused (adj.)
thrown into a state of disarray or confusion;
a confused mass of papers on the desk
Synonyms: broken / disordered / upset
confused (adj.)
mentally confused; unable to think with clarity or act intelligently;
the flood of questions left her bewildered and confused