hard to believe; incredible

hard to endure or tolerate

to find it hard or embarrassing to speak about something, often due to shame or sensitivity

hard to continue; difficult to keep going with a state or action

difficult to grasp, define, or pin down clearly

difficult to change, move, or weaken; deeply entrenched and firmly established

hard to understand or difficult to grasp mentally

hard to accomplish or bring into reality

unable to control one's emotions or restrain oneself; to be beside oneself

hard to deal with or handle