Understands

Nobody understands me.

Students generally like a teacher who understands their problems.

Who that understands music could say his playing was good?

What person who understands music could say that his playing is good?

Mary understands Chinese.

Mrs. Brown understands Japanese.

Lay it down on paper so everyone understands better.

Jane understands your way of thinking.

No one really understands the grief or joy of another.

His boosterism makes it sound wonderful but I wonder if he understands how hard it's going to be to actually carry out.