"Comfortable" is a flexible term. Any one person’s threshold for comfort can differ from another’s. For the individual, comfort is relative: a heat wave in Edmonton, Canada, say, no longer agonizes after one has endured a heat wave in New York. When a person says "comfortable," they often mean "pleasant." Other times "comfortable" translates to just "bearable" or "satisfactory." While the word "comfortable" doesn’t change, a person’s definition of it can, and usually does, with time—that is, with age and experience. It might happen gradually, incrementally, with constant comparisons between then and now. Comfort itself is relative, its meaning elastic.
The word "comfortable" has been thrown around since the Middle [...]