This is the 219th most frequent Estonian word.
asja
The Estonian word "asja" means "thing" or "matter" in English.
Here, 'asja' (in the plural form 'asjad') refers to tasks or matters that need attention.
Mul on veel mõned asjad ajada.
I still have some matters to handle.
Here, 'asja' refers to a specific, unnamed object or thing that the speaker forgot.
Ma unustasin selle asja koju.
I forgot that thing at home.
In this context, 'asja' (in the nominative form 'asi') is used metaphorically to refer to a concept or topic.