to hide; withdraw or remove from observation; cover or keep from sight: He concealed the gun under his coat.
2.
to keep secret; to prevent or avoid disclosing or divulging: to conceal one's identity by using a false name.
Origin: 1275–1325; Middle English conselen, concelen < Anglo-French conceler < Latin concēlāre, equivalent to con-con- + cēlāre to hide (akin to hull1, Greek koleón scabbard (see Coleoptera); compare occult)
1292, from O.Fr. conceler "to hide," from L. concelare "to hide," from com- "together" + celare "to hide," from PIE base *kel- "to hide" (see cell). Replaced O.E. deagan.