keep to oneself

保守秘密，不与人来往

keep on, keep on good terms, keep one's balance, keep one's eyes open, keep one's head, keep one's mind on, keep one's temper, keep one's word, keep oneself/sb from sth/doing sth, keep out, keep out of, keep pace with, keep sb in, keep sb under, keep silence, keep sth back, keep sth. secret, keep sth.(sb.)+adj., keep terms with sb., keep to, keep to sth, keep track, keep under, keep up, keep up with, keep...from, keep...in mind, keep/hold pace with, keeper, keeping, keepsake, keg, keg beer, kelp, kelvin, ken, kennel, kepi, kept, kept woman,