n., adj., adv., & v.
n. 1 a pattern of crossing lines. 2 the crossing of lines or currents etc.
adj. crossing; in cross lines (criss-cross marking).
adv. crosswise; at cross purposes.
v. 1 intr. a intersect repeatedly. b move crosswise. 2 tr. mark or make with a criss-cross pattern.
[ 15th c., f. Christ's cross: later treated as redupl. of CROSS ]