Untoward has a number of different meanings, three of the commonest uses are as follows:-

1 Unexpected and inconvenient;
2 Inappropriate, improper or unseemly;
3 Unfavourable or adverse;
1 The picnic was interrupted by an untoward shower of rain;
2 Malcolm’s untoward advances were rewarded with a kick in the nuts;
3 Some prescription drugs have untoward side effects;
by AKACroatalin October 24, 2016
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a non-favorable, unruly, difficult or impossible to control interaction with someone you typically have some type of love relationship with, but due to conflicting feelings of both love & hate at the same time, the interaction has the potential to quickly spiral out of control.
Yeah, so Jane & I were in the parking lot, and the next thing I know, she's freaking out on me over some stupid comment. What an untoward interaction!
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