The gale had begun to moderate.
I’d like to clarify, are by any chance asking for the meaning
of this sentence?
If we break down the meaning of the words in this sentence;
gale = a very strong
wind
begun = started
moderate = make or become less extreme, intense, rigorous or
violent
Therefore, the meaning of this sentence is the strong wind
started to slow down or the strong has recently lessened its intensity.
I hope this helps in any way.