UNMANNED

unmanned, remote-controlled

(adjective) lacking a crew; “an unmanned satellite to Mars”

UNMAN

unman

(verb) cause to lose one’s nerve; “an unmanning experience”

Source: WordNet® 3.1

Etymology

Adjective

unmanned (not comparable)

not operated by a person or a crew

Synonyms

• (of a vehicle: not operated by a person or crew): crewless, uncrewed

Antonyms

• manned

• crewed

Verb

unmanned

simple past tense and past participle of unman

Source: Wiktionary

Un*manned", a.

1. Etym: [Properly p. p. of unman.]

Definition: Deprived of manly qualities; deficient in vigor, strength, courage, etc.; weak; effeminate.

2. Etym: [Pref. un- not + man + -ed.] (Falconry)

Definition: Not tamed; not made familiar with, or subject to, man; -- also used figuratively. [Obs.] Hood my unmanned blood bating in my cheeks With thy black mantle. Shak.

3. Etym: [Pref. un- not + manned.]

Definition: Not furnished with men; as, an unmanned ship.

UNMAN

Un*man", v. t. Etym: [1st pref. un- + man.]

1. To deprive of the distinctive qualities of a human being, as reason, or the like. [R.] South.

2. To emasculate; to deprive of virility.

3. To deprive of the courage and fortitude of a man; to break or subdue the manly spirit in; to cause to despond; to dishearten; to make womanish. Let's not unman each other. Byron.

4. To deprive of men; as, to unman a ship.

Source: Webster’s Unabridged Dictionary 1913 Edition