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.
Tendonitis or its aliases: tendinitis, tendinopathy and tendinosis are all tendon injuries. Tendinopathy (tendon injuries) can develop in any tendon of the body. Non-insertional tendinopathies tend to be caused by a cumulative microtrauma from repetitive overloading eg overtraining.