OriginFrom Old Norse stíga, from Proto-Germanic *stīganą.
Formssteig(indicative, past, singular, third-person) · stigu(indicative, past, plural, third-person) · stigið(supine) · stíga(infinitive) · stígi(first-person, present, singular) · steig(first-person, past, singular) · stígur(present, second-person, singular) · steigst(past, second-person, singular) · stígur(present, singular, third-person) · steig(past, singular, third-person) · stíga(plural, present) · stigu(past, plural) · stígandi(participle, present) · stigin(participle, past) · stíg!(imperative, singular) · stígið!(imperative, plural)
Source: Wiktionary