What does 心底 mean?
心底 is a Japanese noun meaning “bottom of one's heart” in English. It is written as 心底 in kanji, しんそこ in hiragana, and shinsoko in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
トムはメアリーのことを心底愛してるんだ。
Tom really loves Mary a lot.