deriv► ʕilm al- ṭufayliyyāt, n., parasitology ► ṭaffala, vb. II, 1 to intrude, obtrude, impose o.s. (ʕalà upon); 2 to sponge (ʕalà on s.o., ʕalà māʔidaẗ X at s.o.’s table), live at other people’s expense: D-stem, denom. from ṭufaylī ?
► taṭaffala, vb. V, 1 = vb. II; 2 to arrive uninvited or at an inconvenient time, disturb, intrude; 3 to be obtrusive: tD-stem, denom. from ṭufaylī ?
► mutaṭaffil, adj., n., 1 parasitic(al); 2 parasite, sponger, uninvited guest: PA V. For other items of the root, cf. ↗ṭafl, ↗ṭifl, ↗ṭufāl, and, for the general picture, ↗ṬFL.