obscuration
N การ ปกปิด การ ทำให้ คลุมเครือ
OBSCURATION
n.[L. obscuratio.] 1. The act of darkening. 2. The state of being darkened or obscured; as the obscuration of the moon in an eclipse.
Ob `scu *ra "tion, n. Etym: [L. obscurativ: cf. F. obscuration. See Obscure, v. t. ]