tardigrade
Sluggish; moving slowly.
Each tendril ending in a perfect claw, / Obeys the whole routine of Nature's law; / Transforms each sinus to a sylvan shade, / Though p'rhaps its force is rather tardigrade.
Where it comes from
From Latin tardigradus (“slowly stepping”), from tardus (“slow”) + gradior (“step, walk”), equivalent to Latin tardus + -i- + -grade.
Adapted from the Wiktionary entry tardigrade (CC BY-SA 4.0).