Definition of vendetta. 1  1 : blood feud. 2  2 : an often prolonged series of retaliatory, vengeful, or hostile acts or exchange of such acts waged a personal vendetta against those who opposed his nomination.
A strain is a twist, pull and/or tear of a muscle and/or tendon. Tendons are fibrous cords of tissue that attach muscles to bone. Strains and sprains are among the most common sports injuries.
A grip too large or too small causes strain on the elbow and can contribute to tendonitis. 1  Grip the racquet with your playing hand.  With your other hand place your index finger into the gap between the tips of your fingers and the heel of your hand, as shown.