Here are some options to convey a "silly" feeling in a feminine context:
General options:
* Bête: This means "stupid" or "silly," and can be used for both genders.
* Niais(e): This is a more formal way to say "silly" and can be used for both genders. The feminine form is "niaise."
* Absurde: This means "absurd" and can be used to describe a silly situation or idea.
More specific options:
* Folle: This means "crazy" or "mad" and can be used to describe someone who is silly or eccentric.
* Rêveuse: This means "dreamy" and can be used to describe someone who is silly or whimsical.
* Naïve: This means "naive" and can be used to describe someone who is silly or innocent.
It's important to choose the right word depending on the context and the tone you want to convey.