adj.
VERBS
▪ appear , be , look , seem
▪ become
▪ consider sth
▪
A tunnel was not considered economically ~.
▪ prove sth
▪
The treatment has not proved ~.
ADVERB
▪ entirely , perfectly , quite
▪
It's perfectly ~ to produce electricity without creating pollution.
▪ barely , hardly , not really
▪ administratively , commercially , economically , financially , politically , technically , technologically ( esp. AmE )
Feasible is used with these nouns: ↑ proposition , ↑ solution