Heinif, a. lively, cheerful, brisk
Heinio, v. to pervade; to make all alive: to swarm
Heiniog, a. being pervaded, teeming, swarming
Heintol, a. pervasive; teeming
Heintddwyn, a. pestiferous
Heintfan, n. a plague spot
Heintfanol, a. petechial
Heintiad, a. causing contagion
Heintio, v. to cause contagion
Heintiog, a. contagious