Fetching details from the dictionary...

funny; amusing; comical; laughable; ridiculous
strange; odd; funny; peculiar; weird; wrong; unusual; eccentric
wrong; unsuitable; improper; inappropriate; unbecoming
suspicious
友達が言うことはおかしい。
What my friend says is funny.
何かおかしいと思いました。
I thought something was strange.
この機械の動きがおかしいと思いませんか。
Don't you think this machine is acting strange?