chest [tʃɛst] ящик; сундук
treasure [ˈtrɛʒə] драгоценность; сокровище
course [kɔːs]курс
of course - конечно
Phrase of course is attested from 1540s; literally . "of the ordinary course;" earlier in same sense was bi course (c.1300).
attest [əˈtɛst] (attest to) свидетельствовать
ordinary [ˈɔːd(ə)nrɪ] стандартный