This is the 582nd most frequent Czech word.
srdce
Heart.
Here 'srdcem' is in the instrumental case, denoting the means or manner by which I express love.
Mám tě rád celým svým srdcem.
I love you with all my heart.
Here, 'srdce' is used metaphorically to denote centrality or importance in a figurative sense.
Praha je často nazývána srdcem Evropy.
Prague is often called the heart of Europe.
In this context, 'srdce' refers to the physical organ within the body, central to the circulatory system.