Matutar
ɡomqomi sɛŋqɐkhɐdɐ ɡɒmɡəmaɪ siːŋɡɐkɑːdə tə θɪŋk diːpli bʌt ɪt meɪ nɒt fʊli kənveɪ ðə sɛns ɒv ɪntɜːnəl dɪlɪbəɹeɪʃən and wʌɹi
In Korean 곰곰이 생각하다 (gomgom-i saenggakada) - to think deeply, but it may not fully convey the sense of internal deliberation and worry.
To think deeply about something, to ponder or mull over a problem or situation.
Example
"Ele estava matutando sobre a decisão difícil."
