tardus (opposed to celer, velox; also of the mind): lentus (opposed to citus; and of the mind, opposed to acer): segnis (opposed to promptus). According to Döderlein, tardus denotes slowness with reference to the great length of time spent; whereas lentus with reference to quietness of motion (Handbuch, p. 209): Slow in transacting business, tardus in rebus gerendis: to be slow in writing, cessatorem esse in litteris: slow in learning, tardus ad discendum or in discendo; lentus in discendo; ingenio tardo; piger (slothful): slow of apprehension, hebes, hebes ad intelligendum, tardus (stupid); stupidus (dull, stupid). (The words are found in this connection and order.) stupidus et tardus: mente captus (without understanding): slow poison, venenum lentum.