Meaning : With the hand swung below shoulder level.
							Example : 
							Throwing a ball underarm.
							
Synonyms : underhand
Meaning : With hand brought forward and up from below shoulder level.
							Example : 
							An underhand pitch.
							An underhand stroke.
							
Synonyms : underhand, underhanded
With hand brought forward and down from above shoulder level.
An overhand pitch.