The phrase is applied across various fields to describe the act of adding necessary substance or support:
According to the Collins Dictionary , to "bolster up" means to something. bolster up
: By the late 16th century, the term expanded beyond physical padding to describe the reinforcement of abstract concepts like morale or arguments. 2. Linguistic Definition The phrase is applied across various fields to
: While "bolster" can stand alone, adding "up" often emphasizes the act of propping something that might otherwise collapse or fail. bolster up
: It evolved into a verb in the mid-1500s, originally describing the act of women adding padding to their dresses or corsets to create a fuller shape.