secretively

adjective

1. having or showing a disposition to secrecy; reticent: He seems secretive about his new job.

adjective

1. inclined to secrecy; reticent
2. another word for secretory

adj.“inclined to secrecy,” 1815 (implied in secretiveness); see secret (n.) + -ive. The word also was in Middle English with a sense “secret, hidden” (mid-15c.). Related: Secretively.