General "opt" meaning "to choose":
* Pumili - This is the most common and straightforward translation.
* Magpasya - This emphasizes the act of making a decision.
* Mag-isip - This implies considering different options before choosing.
"Opt out" meaning "to choose not to participate":
* Tumanggi - This translates to "to refuse" or "to decline."
* Umiwas - This means "to avoid" or "to step back."
* Hindi sumali - This literally translates to "not join."
"Opt in" meaning "to choose to participate":
* Sumali - This translates to "to join."
* Mag-sign up - This emphasizes the act of signing up for something.
* Pumayag - This means "to agree" or "to consent."
The best translation will depend on the specific context and the nuance you want to convey.
For example, "opt out of a subscription" would be best translated as "tumanggi sa subscription," while "opt in to receive marketing emails" could be "mag-sign up para makatanggap ng mga email sa marketing."