Sad Feeling You Get When You Have No Company
This page is the CodyCross answer for the clue below from Time for a check-up, Group 1717, Puzzle 4 (Electrocardiogram).
Question is: Sad Feeling You Get When You Have No Company
and the answer is: LONELY
Word Meaning:
LONELY — Unhappy due to feeling isolated from contact with other people.
Definitions from Wiktionary.