ॐ त्रयम्बकं यजामहे
सुगन्धिं पुष्टिवर्धनम् ।
उर्वारुकमिव बन्धनान्
मृत्योर्मुक्षीय मामृतात् ॥

This is the Maha Mrityunjaya Mantra. We worship the three-eyed One (Lord Siva) Who is fragrant and who nourishes well all beings; may He liberate us from death for the sake of Immortality even as the cucumber is severed from its bondage (to the creeper) rankhaya.com.

Word meanings:
ॐ = same as `OM’ i.e. the praNava or `o.nkAra’ mantra;
त्रयम्बकं = the three-eyed one;
यजामहे = Let us do the sacrifice;
सुगन्धिं = the one who is fragrant;
पुष्टिवर्धनं = that which increases nourishment;
उर्वारुकमिव = like the cucumber;