This is the 762nd most frequent Japanese word.
やり
Spear; lance.
やり is used in the compound verb 'やり残す' meaning 'to leave (something) undone'.
彼は新しい遊び方を試してみたいとやり残した。
He wanted to try the new way of playing he had left undone.
やり is used in the compound verb 'やり遂げる' meaning 'to accomplish' or 'to carry through'.
彼女はそのボランティア活動をやり遂げた。
She accomplished that volunteer work.
やり is used as a verbal noun synonymous to 'to do', derived from the verb 'やる'.