Crossword clue: to strengthen, as with sinews; to invigorate. all members of our cause, . . . that are insinewed to this action. shak.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
To strengthen, as with sinews; to invigorate. [Obs.] All members of our cause, . . . That are insinewed to this action.