Origin of dejectMiddle English dejecten ; from Classical Latin dejectus, past participle of dejicere ; from de-, down + jacere, to throw: see jet
transitive verbde·ject·ed, de·ject·ing, de·jects
Origin of dejectMiddle English dejecten, from Latin d&emacron;icere, d&emacron;iect-, to cast down : d&emacron;-, de- + iacere, to throw; see y&emacron;- in Indo-European roots.
(third-person singular simple present dejects, present participle dejecting, simple past and past participle dejected)
From Old French dejeter, from Latin deicere (“to throw down”).