The most appropriate synonym for "announce" is "advertise." "Announce" means to make something known or to declare publicly, and "advertise" involves making information or products known to the public through various means. The other options, such as "denounce" (to condemn publicly), "secret" (concealed), and "hide" (to keep something out of sight), have different meanings and do not convey the idea of making information widely known as "advertise" does.

The most appropriate synonym for "satisfaction" in the given sentence is "contentment." "Contentment" refers to a state of being satisfied and at ease. The other options, such as "refreshment," "pride," and "bliss," have different nuances and do not precisely capture the sense of fulfillment conveyed by "satisfaction" in this context.

The most appropriate synonym for "competent" is "capable." "Competent" and "capable" both imply having the necessary skills, knowledge, or ability to perform a task effectively. The other options, such as "complex" (intricate), "poor" (lacking in skill or ability), and "beginner" (novice), have different meanings and do not convey the same idea of proficiency and capability as "competent" does.