to use to the full (one's voice, energy, etc.); to muster all of (one's strength, courage, etc.); to summon all of; to exert fully; to strain (one's voice)
to use to the full (one's voice, energy, etc.); to muster all of (one's strength, courage, etc.); to summon all of; to exert fully; to strain (one's voice)
to draw (a bow) to the limit; to pull tight; to squeeze tight; to strain (voice)