Englishfor English speakers
particularly
Adverb
—
If something is particularly interesting, useful, important, etc., it is more so than usual or more than others.
Tonight's dinner was particularly good.
They are helpful for everyone but can be particularly useful for younger students.
He never does anything particularly interesting.
since
Preposition
—
From a particular time in the past until now or until a later time in the past.
I haven't been there since 1969.
Since you told me about it, I've been thinking a lot.
—
You use since to show that something known is the reason for something else.
Since John can't be there, we'll try for another day. (The audience already knows that John can't be there.)