köken: Cognate with Kazakh жігерлі (jıgerlı, “active, vigorous”), Kyrgyz жигердүү (jigerdüü, “brave, valiant; active”). Ultimately derived from Persian جگر (jegar) in the sense of "spirit, courage".
çekim: karşılaştırma hardnekkiger · üstünlük hardnekkigst
köken: From Middle Dutch hartnackich. Equivalent to hard (“hard”) + nek (“neck”) + -ig (“-y”), literally “having a hard neck”. Cognate with German hartnäckig. Compare halsstarrig.
köken: Uncertain. Traditionally connected with dialectal ahku (“eagerness, zeal”), but this word is likewise of unknown origin. According to Häkkinen (2004), which follows Nikkilä (1998), perhaps a borrowing from dialectal Swedish ager (“hard-working”), but this sense for the word, supposedly found only in dialects within Finland, does not seem to have a particularly wide distribution nor even be the…
köken: Present active participle of dīligō (“esteem, love”)
Etimoloji
Unknown. Arguably from Old Swedish illhærdig (“stubborn”). Arguably from Old Swedish hærdhas i nokro (“endure”). Compare Old Norse einarðr (“persistent”).