a. [f. as prec. + -ORY2.] Of, pertaining to, or characterized by trepidation or tremor.
1881. G. F. Rodwell, in Knowledge, 16 Dec., 130/2. The most severe shock lasted for 70 seconds, and combined oscillatory, trepidatory, and rotatory movement.
1890. W. OBrien, When we were Boys, 191. You are joking, he said, in the trepidatory tone of one who had just heard the last Trumpet was about to sound.