preposterous (adjective) preposterous: ridiculous, bizarre
Sinonime: after,
as, beneficial to,
concerning, conducive to,
during, for the sake of, in contemplation of, in exchange for, in favor of, in furtherance of, in order to, in order to get, in place of, in pursuance of, in spite of, in the direction of, in the interest of, in the name of,
notwithstanding, on the part of, on the side of,
pro, supposing,
to, to counterbalance, to go to, to the amount of, to the extent of,
toward, under the authority of, with a view to, with regard to, with respect
Antonime: reasonable,
sensible