盤根錯節

ばんこんさくせつ

noun

•

hard to penetrate event or situation(yojijukugo)

盤	tray, shallow bowl, platter, tub, board, phonograph record
根	root, radical, head (pimple)
錯	confused, mix, be in disorder
節	node, season, period, occasion, verse, clause, stanza, honor, joint, knuckle, knob, knot, tune, melody