This is the 7402nd most frequent Japanese word.
似通っ
"似通っ" means "to resemble closely" or "to be similar."
In this sentence, '似通っ' is used to describe similarity in abstract concepts, specifically ways of thinking.
彼らの考え方は非常に似通っている。
Their way of thinking is very similar.
Here, '似通っ' refers to physical or visual likeness between two entities.
この二つの絵は細部まで似通って描かれている。
These two paintings are depicted very similarly in details.
'似通っ' in this sentence describes similarity in styles or trends over time.