sekoittaa

to mix; to stir
to mess up, untidy, disorder to make a mess of by disturbing the order of it
to mess up, spoil, ruin to cause a problem with
to shuffle to put in a random order, e.g. playing cards
to upset, disturb, disrupt to adversely alter
to confuse, mix up (one thing with another)
(idiomatic) to blow, in the expression sekoittaa jonkun pää ("blow someone's to blow someone's mind")

Suffix from Finnish seka- (mixed).

Finnish

seka-

mixed