coistril
Cois"tril, n. Etym: [Prob. from OF. coustillier groom or lad. Cf. Custrel.] 1. An inferior groom or lad employed by an esquire to carry the knight's arms and other necessaries. [Written also coistrel.] 2. A mean, paltry fellow; a coward. [Obs.] Shak.