a. 1. Of or relating to a peak; or to peaks; belonging to a mountainous region. “Her peakish spring.” Drayton. “His peakish dialect.” Bp. Hall. [ 1913 Webster ]

2. Having peaks; peaked. [ 1913 Webster ]

3. Having features thin or sharp, as from sickness; hence, sickly. [ Colloq. ] [ 1913 Webster ]