i think ΓΚΕΤΕ in ancient greek means nothing.
As said before, IMHO there's no intial gamma; so IKETE looks good as the word on the first row.
On second row I seem to recognize an initial omega "ω" (could be it an invocation like "oh,..")?
On third row, could the apparent "ψ" be instead a "φ" and the sigma be an "E" leading to "eiφ'" or even " ἕψω" (too many alternatives due to vanished signs)?
All the above could lead to a phrase like "ικετε ὠπή Δί .. " which could be stretched to an invocation like "I beg you, watch me Zeus"
..then a thunderbolt from the divinity hit the cave and the food got cooked (ἕψω") boiled..