The two Greek words most often bundled together in English, and they point in different directions. Meraki is what you owe the work — the care that shows in the thing you made. Philotimo is what you owe other people. One is answerable to an object; the other to a community.
Side by side
Aspect
Meraki
Philotimo
Owed to
The work
Other people
Visible in
The object
Your conduct
Origin
Ottoman loan
Ancient Greek
First sense
Longing
Ambition
What each one means
Meraki
Meraki is doing something with passion, zeal and gusto — putting your whole self into it. Its earlier Greek sense is intense longing or desire, from Ottoman Turkish merak; the familiar English rendering, 'the trace of yourself you leave in what you make', is a translation flourish rather than a recorded Greek definition.
Philotimo is the internal obligation to do the generous and right thing because of who you are, with no expectation of return — a word that carried both senses in antiquity — vainglorious ambition in one register, honourable ambition and lavish public generosity in another.