not in keeping with accepted standards of what is right or proper in polite society; "was buried with indecent haste"; "indecorous behavior"; "language unbecoming to a lady"; "unseemly to use profanity"; "moved to curb their untoward ribaldry"
If you say that something untoward happens, you mean that something happens that is unexpected and causes difficulties. The surveyor's report didn't highlight anything untoward Tampering with a single enzyme can lead to untoward effects elsewhere. unexpected, unusual, or not wanted anything/nothing untoward (toward (15-18 centuries))