Collocations for impractical - adj.

be, prove
Such a solution proved impractical.

become | make sth
The weight of the machine makes lifting it impractical.

consider sth, deem sth, find sth, regard sth as
They found his ideas impractical.

highly, hopelessly
The long flowing dress was highly impractical.

completely, downright, entirely, quite, totally, wholly | rather, somewhat | fundamentally
a fundamentally impractical design

obviously

be, seem

hopelessly
He was hopelessly impractical when it came to planning new projects.