bolster - Dictionary definition and meaning for word bolster
RELATE TO BOLT>> USED TO SUPPORT OR REINFORCE
read bolster as booster which mean giving extra energy and hence to support and strengthen someone or something.
Make Something BOLDer
Bolster actually means , Raise physical or mental Strength
sounds like foster
Bolster = bol (talk) + ster(star);
Bolster = Fit the bolt for star i.e to support.