Wikipedia
A is a Japanese dagger, possibly derived from the masonry trowel. The two widely recognized variations of the kunai are and the . Although a basic tool, in the hands of a martial arts expert, the kunai could be used as a multi-functional weapon. The kunai is commonly associated with the ninja, who used it to gouge holes in walls. Kunai were originally made to be farming tools but soon evolved into the weaponry they have become today. Many popular manga and ninjutsu characters use kunai as both their primary and secondary weapons.
Usage examples of "kunai".
He had followed the advice of a Melanesian boy and every night he had applied wisps of kunai grass soaked in the urine of the Cuscus or Coconut Possum.
Hamadryad sprinkled it with sharkskin pepper and also with kunai seed, spilling much of both from his shaking hand.
Painfully, agonizingly, he was moving little flecks of sharkskin pepper and kunai seed about on the table, moving them with mental anguish but not touching them except with his mind.
The Sepik River has vast stretches of swampland on both sides where the Kunai grass grows up to twelve feet tall.
Several times, when the pounding of alien claws on the earth had warned him of an approaching horde, he had ordered his tank into low ground, dense Kunai grass or copses of thick standing trees.
The Battle of the Eastern Solomons, 24 August 1942 Guadalcanal is mountainous, covered with dark-green rain-forest jungle, interspersed with patches of light-green kunai grass, whose tall, saw-toothed blades can inflict a nasty wound on walkers.