Emily Dickinson Lexicon

CON-CEAL', v.t. [Low L. concelo; con and celo, to withhold from sight; Sax. helan, hælen, gehælan, gehelan, to heal and to conceal; G. hehlen, to conceal, and heilen, to heal; D. heelen, to heal and to conceal; Dan. hæler, to conceal; W. celu, to hide; Fr. celer; It. celare; Sp. callar, to keep silence, to dissemble, to abate, to grow calm; Port. calar, to conceal or keep close, to pull or let down, “cala a boca,” hold your peace; also intransitive, to be still or quiet, to keep silence; coinciding in origin with whole, all, holy, hold, &c. The primary sense is to strain, hold, stop, restrain, make fast or strong, all from the same root as the Shemitic כול, כלא, كَلأَ, ከልአ kalea, Gr. κωλυω. Class Gl, No. 32, 36.]

1. To keep close or secret; to forbear to disclose; to withhold from utterance or declaration; as, to conceal one's thoughts or opinions. I have not concealed the words of the Holy One. Job vi.
2. To hide; to withdraw from observation; to cover or keep from sight; as, a party of men concealed themselves behind a wall; a mask conceals the face. What profit is it if we slay our brother and conceal his blood? Gen. xxxvii.