Answer:
Underweight : below a weight considered normal/ desirable.
Dishonor: a state of shame or disgrace.
Disbelieve: to not believe something/ someone
Premix: mix in advance
Predate: exist or occur at a date earlier than something
Underfoot: constantly present and in one's way
Disprove: to prove that something is false
Pregame: denotating or relating to an event that occurs immediately before a particular sporting game.
Underarm: a persons armpit
Disobey: failing to obey to someone's rules, a command, or someone of authority.