I'd appreciate if someone can guide me what rhetorical devices are used in the following sentence and what device is the last word. Thanks.
And since I have been training for Olympics from her, all of our techniques are, shall we say, secret.
It's "training for the Olympics". "From her" does not make sense. If you mean that she was your coach, you could write "with her".
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It's "training for the Olympics". "From her" does not make sense. If you mean that she was your coach, you could write "with her". "Since" is puzzling, especially with the simple present "are". It seems to mean that as a consequence of her involvement, the techniques are secret.
Ignoring all that, I see no rhetorical devices.