(informal) the testicles as an attack target / (informal) attack on the testicles

once again, once more

abrasion, attrition (wearing by friction)

to wear, be worn away

blind spot (place where the optic nerve attaches to the retina) / something overlooked, a point not noticed

felt

cover with food

Spirits of mountains and streams

dim, obscure (of moonlight)

one thousandth of a 寸 (sun) (approximately 0.0303 mm) / one thousandth of a 匁 (monme) (exactly 3.75 mg) / one thousandth of a 割 (wari) (0.01 percent)