Where does “tirelessly” come from?

Tirelessly comes from English tireless, formed with the Old English suffix -līċ (meaning resembling or having the quality of) combined with tire, which derives from Old English -lēas (meaning without or lacking) and Proto-Germanic galīkaz, ultimately tracing to Proto-Indo-European roots.

tirelessly (English): In a tireless manner; without tiring, flagging,...

Definitions

  1. In a tireless manner; without tiring, flagging,...

Ancestry of “tirelessly”, step by step

StepLanguageWordMeaning
1EnglishtirelessIndefatigable, untiring and not yielding to...
2English-less(something); without (something). Added usually to a noun to form an adjective signifying a lack of that noun
3Middle English-lesLacking (something); without (something)
4Turkish-lewith, shortened form of ile; by, shortened form...
5Turkishilewith; and
6Ottoman Turkishایلهby
7Old Anatolian Turkishاِیلَه
8Proto-Turkicbilewith, together, also
Every word from Proto-Turkic bileEvery word from English -lessEvery word from Middle English -les