preswell means to cause to become engorged with fluid prior to some other operation. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From pre- + swell.
verb
- To cause to become engorged with fluid prior to some other operation.“In order to secure uniform depth development it is often necessary to preswell the gelatin to facilitate access of the developer to the deepest grains.”