RAIL is closest in meaning toinfringescoldblanchserenade

The word "RAIL" is closest in meaning to "scold". Here are the steps to determine this:

1. Understand the meanings of the given words:

   • Infringes: Actively break the terms of a law, agreement, etc.
   • Scold: Remonstrate with or rebuke (someone) angrily.
   • Blanch: Make white or pale by extracting color; bleach.
   • Serenade: A piece of music sung or played in the open air, typically by a man at night under the window of his lover.

2. Compare these meanings with the meaning of "RAIL":

   • Rail: Complain or protest strongly and persistently about.

3. From the comparison, it's clear that "scold" is the closest in meaning to "rail" as both involve expressing disapproval or criticism.