ποῖόν σε ἔπος φύγεν ἕρκος ὀδόντων → what a word has escaped the barrier of your teeth
trĭfŏlĭum: ii, n. ter - folium,I threeleaved grass, trefoil, Plin. 21, 9, 30, § 54; 21, 21, 88, § 152.