Normally there is no need for a colon, unless you are introducing a long list of examples.
Colon cleansers help the body to clean out the system, and feel refreshed. These prevent diseases and ways to get sick. Colon cleansers are normally used on individuals older than 50.
Sluggish or being sluggish implies slowness in response or action.
"Sluggish" is an adjective.
She felt sluggish when she woke up this morning. He was sluggish at work today.
normally with a colon ":"so a ratio of 1 to 50 would be written 1:50
There are no perfect rhymes for the word sluggish.
No, nervous and sluggish are not synonyms.
Sluggish weevil was created in 1763.
A synonym for slow or sluggish is lethargic.
An antonym for sluggish is energetic or lively.
After a heavy meal, I felt sluggish and had trouble concentrating on my work.