in·de·fat·i·ga·ble ( n d-f t -g -bl)adj. Incapable or seemingly incapable of being fatigued; tireless. See Synonyms at tireless. [Obsolete French indéfatigable, from Latin ind  fat g bilis : in-, not; see in-1 + dfatgre, to tire out (d-, intensive pref.; see de- + fatgre, to weary).]in de·fati·ga·bili·ty, inde·fati·ga·ble·ness n.in de·fati·ga·bly adv. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | indefatigability - tireless determination determination, purpose - the quality of being determined to do or achieve something; firmness of purpose; "his determination showed in his every movement"; "he is a man of purpose" |
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