Untoward (adjective)

1. Not favorable; adverse.
2. Difficult to control or manage; unruly.
3. Inappropriate or unacceptable; discourteous.

Origin:

Middle english, from un- + toward.

Examples:

1. The weather turned out to be untoward for the outdoor picnic.
2. The young child was untoward and misbehaved at the restaurant.
3. The ambassador's untoward behavior caused a diplomatic incident.
4. The untoward consequences of the experiment were unexpected.
5. The company's financial results were untoward due to the economic recession.