The answer to 'sink slow draining' is a clogged drain. This is a common plumbing issue caused by buildup of hair, soap scum, food particles, and other debris in the drain pipe. Symptoms include water draining slowly or backing up in the sink. The solution is to clear the clog, which can often be done with a plunger or drain snake, but may require calling a professional plumber if the clog is severe or the issue persists.
Slow draining sinks should be addressed promptly to prevent further clogs and potential water damage. Homeowners can try DIY methods first, but if those are unsuccessful or the problem recurs, it's best to call a licensed plumber to properly diagnose and resolve the issue.