verb/maʁ.tə.le/
to strike with a hammer; to hammer; to shape or forge with a hammer; to emphasise individual elements such as words or notes; to repeat insistently; to trouble; to bother; to worry
“De retour dans son atelier, il inspecta pour la mille et unième fois les lettres qu'il avait si langoureusement martelées.” — Returning to his workshop, he inspected for the thousand and first time the letters that he had so laborously carved.
Inherited from Middle French [Term?], inherited from Old French marteler, from martel (old form of marteau (“hammer”)) + -er. Compare to English martel, Dutch martelen.