Spanish · Pronunciation Guide
seh-GOO-roh, three beats with a soft g and a single tapped r.
Three syllables, se-GU-ro, beat on the second-to-last, following the default rule. All four forms keep it. The noun "seguridad" moves the beat to the end because of its d ending, and "seguro" itself doubles as a noun meaning insurance — same sound, same stress, different job.
Listen: seguro
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
Estoy seguro de eso.
I'm sure about that.
Listen: Estoy seguro de eso.
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
"Estoy seguro de eso" needs the preposition "de" after the adjective, which English drops — you are sure of that. Note the choice of estar: with ser, "soy seguro" would describe you as a safe or reliable person, not a confident one. "De eso" merges the two e sounds into one longer vowel.
Half the difficulty is the g, hardened into the plosive of "go" when between vowels it should be soft and almost breathy. The r then gets the English curl instead of a single flick. And the ser-estar split matters here as much as anywhere: "estoy seguro" is I am sure, "es seguro" is it is safe, and swapping them produces sentences that sound odd rather than merely accented.