Ge-þaccian

According to the Old English Dictionary:

ge-þaccian

p. ode. I. to strike gently with the open hand, pat, clap :-- Hé lufode mid his brádre handa þá nunnan and ofer þa sculdru geþaccode in tergo sanclimonialis feminae blandiens alapam dabat, Gr. D. 189, 22. II. to soothe by patting (?), tame :-- Getaccodon (-þaccodon?) edomitis, Germ. 402, 63. ge-þaccian