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.
この店の料理はそこそこの味だ。
The food at this restaurant is fairly good.
adverb
hurriedly; in a rush; barely finishing
Used in the pattern 〜もそこそこに, meaning doing something hastily or just after barely finishing another action. Often implies a sense of urgency or incompleteness.
朝食もそこそこに家を出た。
I left home in a rush, barely finishing breakfast.
suffix
Attached to numbers or quantities as a suffix to indicate approximation. Casual and somewhat colloquial.
駅まで十分そこそこ歩く。
It takes about ten minutes to walk to the station.