impractical adj.

1 not sensible or reasonable

VERBS 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.

ADV. highly, hopelessly The long flowing dress was highly impractical. | completely, downright, entirely, quite, totally, wholly | rather, somewhat | fundamentally a fundamentally impractical design | obviously

2 not good at everyday jobs

VERBS be, seem

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