Uncrewed
ahd-5
adjective.
Not having a crew; crewless.
Wiktionary, Creative Commons Attribution/Share-Alike License
adjective.
Without a
crew
;
unmanned
.
Word Usage
"Robotic probes and so-called uncrewed cosmic laboratories have done their work during the shuttle era, delivering a big scientific bang for the buck, compared to experiments done by human space voyagers."
suggests
unscrewed
Synonym
Words with the same meaning
crewless