matchless effort

See: main force
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References in classic literature ?
The storm culminated in one matchless effort that seemed likely to tear the island to pieces, burn it up, drown it to the tree-tops, blow it away, and deafen every creature in it, all at one and the same moment.
Minister of Electricity Imad Khamis, also delivered a speech in which he said the elections will crown the matchless efforts the Syrians and state have been exerting to defend the country and help hold its ground against the takfiri terrorist war raging in it.
Shazia said Malala deserves praise for what she has done and that God has awarded her a second chance to live in recognition of her matchless efforts.