малодушничать
animum demittere [o, misi, missum] / despondere [eo, spondi, sponsum] / abjicere [io, jeci, jectum]; animo concidere [o, idi, -] / contrahi [or, tractus sum] / defici [ior, defectus sum] / frangi [or, fractus sum] / debilitari [or, atus sum] ;