無理

無理

"Impossible" or "unreasonable."

In this sentence, '無理' ('impossible') emphasizes that performing the task alone is not feasible or realistic.

この仕事を一人でやるのは無理です。

It's impossible to do this job alone.

Here, '無理' suggests overexertion or pushing oneself beyond reasonable limits.

無理をしないで、少し休んでください。

Don't overdo it; please take a rest for a while.

In this usage, '無理' conveys an opinion that the action at that time is somewhat impractical or unfeasible.

その時間に行くのは少し無理があると思います。

I think going at that time is somewhat unreasonable.