Today we are moving on to a new character 温 | 溫, by which we can prepare ourselves to understand 愠 better.
Looking at its Simplified version 温, we can tell that it is composed of water （氵）, sun (日) and basin (皿), which we all have learned before.
Comparing to its Traditional version 溫, the only difference is to replace 日 in 温 with 
in 溫.
So what does 温 | 溫 mean by having water in a basin plus 日 or ? Probably its ancient scripts can provide more clues, which is shown below:
 |
| evolution history of 温 |
Now we can see that its Oracle script 
looks like to represent a person (
) is standing inside a basin (
) with some extra dots around him (
). What could be the possible scene here? Based on the actual meaning of 温, it is most likely as what shown below:
 |
| 温 | 溫 |
when it came to Bronze script: 
, the upper part was changed to 
, which is likely to represent "wrapping somebody (and bath him)" in the basin.
Starting from later stage of Bronze script
, 温 | 溫 followed the path of but added water 
to re-introduce that 温 | 溫is related to water.
With enough preparation, now we can start to reason the meaning of 温 | 溫 - a drawing of bathing a person (most likely a baby) in a basin with warm water.
Chinese ancestors used this drawing to represent the meaning of warm. It is also interesting for us to realize that replacing in 溫 with 日 in 温 during simplification makes perfect sense.
So 温 | 溫 means warm, for example 温水.
And 温 | 溫 can used as verb, which means make or become warm, for example 温习.
And 温 | 溫 is also used to describe somebody as warm and gentle as warm water. for example 温柔.
That is all for 温 | 溫, let us enjoy a Chinese calligraphy with 温 | 溫 inside:
 |
| 温不增华，寒不改叶 |
