adverb, noun which may take the genitive case particle 'no'
reasonably; fairly; moderately
Describes a moderate, acceptable degree; often used when something is not outstanding but good enough. Can modify verbs, adjectives, or nouns with の.
試験はそこそこできた。
I did reasonably well on the exam.
The food at this restaurant is fairly good.
Attached to numbers or quantities as a suffix to indicate approximation. Casual and somewhat colloquial.
It takes about ten minutes to walk to the station.
At this company you can get a decent enough salary.
I rushed out of the house, barely finishing breakfast.
Only about 30 people or so gathered at the venue.