mantra
noun
[ ˈmantrə ]
• (originally in Hinduism and Buddhism) a word or sound repeated to aid concentration in meditation.
• "a mantra is given to a trainee meditator when his teacher initiates him"
• a statement or slogan repeated frequently.
• "the environmental mantra that energy has for too long been too cheap"
Origin:
late 18th century: Sanskrit, literally ‘a thought, thought behind speech or action’, from man- ‘think’, related to mind.