[ ter-uh-fawrm ]
/ ˈtɛr əˌfɔrm /

verb (used with object)

to alter the environment of (a celestial body) in order to make capable of supporting terrestrial life forms.

Origin of terraform

1975–80; terra + form; perhaps taken as v. use of an adj. with -form as second element
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019