unnaturally -- (in an unnatural way; "his other arm lay across his chest, unnaturally, as if placed there deliberately, for a purpose")
artificially, unnaturally, by artificial means -- (not according to nature; not by natural means; "artificially induced conditions")
unnaturally -- (in a manner at variance with what is natural or normal; "The early Church not unnaturally adopted the position that failure to see the messianic character of his work was really caused by the people's own blindness")