impractical

of something that cannot be done or used easily or effectively ซึ่งไม่มีประสิทธิภาพเมื่อนำมาใช้งานจริง,ที่ใช้งานไม่ได้

Because of the large number of dead trees scattered around a relatively small area it was difficult, if not impractical, to bring in heavy machinery.

Although Thai law allows girls who have given birth to return to school, this is often impractical.

Digging ditches is impractical here because of the hilly landscape, he explained.