read + do thoroughly, until it settles in or sinks in
yomi komu
do thoroughly, until it settles in or sinks in
meaning: read thoroughly
試験前に、単語を覚えこむ。
shiken mae ni, tango o oboe komu.
Before the exam I remember thoroughly all the vocabulary. neutral
二人はすっかり話し込んでしまって、電車を逃しちゃった。
futari wa sukkari hanashikonde shimatte, densha o nogashichatta.
The two of them got so deep into conversation that they missed the train. casual