someone who is difficult to deal with because they are unpleasant or very determined to get what they want.

People don't tend to mess with Sue. She's a tough nut.

• two-bit
• two can play at that game
• two cents
• two cents worth
• two-faced
• two of a kind
• two peas in a pod
• two's company
• two's company three's a crowd
• two sides of the same coin
• en route
• enter into the spirit of
• enter into the spirit of something
• enter the fray
• err is human.
• err is human, to forgive, divine.
• err on the side of
• err on the side of caution
• err on the side of something
• esprit de corps
• et al.
• even better
• even if only
• even so
• even stevens