Our experience in the past has proved this very unsatisfactory.

Also, the previous night had proved unsatisfactory and his morale was low.

However, the Ki-5 design quickly proved unsatisfactory in flight testing.

As these talks proved unsatisfactory, the Soviets began to consider a military alternative.

Even if this system proved unsatisfactory, it was likely to be the last one they would ever see.

However, the source soon proved unsatisfactory, and unsuitable for domestic use.

I should strongly suspect that as a husband he might prove unsatisfactory in more ways than one.

And I dare say he won't prove much more unsatisfactory than any other husband she might choose.

The school must have proved unsatisfactory, for in 1872 it was forced to become a board school.

Lamps mounted on the arms proved unsatisfactory for night use.