The term 'unspoken, as an approval' can be summarized by the crossword solution 'TACIT'. TACIT approval is a form of agreement that is not expressed in words but is implied through actions or silence. It is often used to describe a situation where one party does not explicitly agree to something, but their inaction implies that they are in agreement. This type of approval is often seen in situations where one party is not comfortable expressing their opinion or feelings.