Final answer:
The closest match for the word 'wet' in the question's context is a) 'milksop', which means a timid or spineless person.
Step-by-step explanation:
The word wet does not directly match any of the options provided in the question (a) milksop (b) softie (c) lightweight (d) loser.
However, if we consider the word 'wet' in a figurative or slang context, it can sometimes be synonymous with 'wet blanket' or someone who is meek and ineffectual. In this context, the closest match would be a) milksop, which describes a person who is timid or lacks courage.