Sentence:  When Park came down from his vault, <WSD>sticking the landing</WSD> perfectly upright and unwavering, a huge roar went up from the 13,596 spectators. 
Meaning of the word marked with <WSD> tags:  To complete a gymnastic or other athletic routine involving leaps, vaults, somersaults, etc. by landing firmly, solidly, and flawlessly on one's feet.