Ameliorate
The opposite of pejoration (worsening) would be amelioration (building, strengthening).
it is generalization..
To ameliorate is to improve. To pejorate is to worsen. So in this case, you would have to look at whether the connotative meaning of the word "doom" has worsened or gotten better. My best guess is that it has probably worsened, so it would be pejoration.
No, the word "surly" is not an amelioration. It typically has a negative connotation, meaning bad-tempered or unfriendly. An amelioration is a process where a word's meaning evolves to become more positive over time.
Pejoration
An amelioration is an act of ameliorating - of making better or improving.
Amelioration in terms of slavery is the policy of improving slave conditions.
In the year 1830, amelioration totally ended so that emancipation could have been achieved.
The process of a word gaining a negative meaning is called pejoration. This typically happens when a word's original neutral or positive connotation shifts over time due to cultural, social, or linguistic changes. The evolution of language and usage patterns can contribute to this shift in a word's meaning.
The carpenter got out his tools to ameliorate the rocking chair.
AMELIORATION
this failure of amelioration relates to British West Indian history. It led to the emancipation of countries in the British West Indies.