inconvenience
n. C / Un. a situation that causes a small problem or makes things more difficult for you. It is often used in polite apologies when something does not go as planned.
n. a state or instance of trouble or difficulty that causes slight discomfort or annoyance. Often used in formal correspondence to mitigate the impact of a service failure or scheduling change.
We apologize for any inconvenience caused by the delay.
The temporary closure of the main road was a major inconvenience for local commuters during rush hour.
While the software update was intended to improve security, the resulting system downtime proved to be a significant inconvenience for the global sales team.
From Middle English inconvenience, from Old French inconvenience (“misfortune, calamity, impropriety”) (compare French inconvenance (“impropriety”) and inconvénient (“inconvenience”)), from Late Latin inconvenientia (“inconsistency, incongruity”).
Uncountable when referring to the general state of trouble; countable when referring to a specific event or circumstance.
I am sorry for the inconvenientI am sorry for the inconvenienceLearners often use the adjective 'inconvenient' where the noun 'inconvenience' is required.