Webster's English Dictionary

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respire

re.spire \ri-'spi-(*)r\ vb [ME respiren, fr. L respirare, fr. re- + spirare 
   to blo]w, breathe - more at SPIRIT 1: BREATHE; specif : to inhale and 
   exhale air successively  of a cell or tissue  2: to take up oxygen and 
   produce carbon dioxide through oxidation  : BREATHE