Possible Results:
estás siseando
-you are hissing
Present progressivetúconjugation ofsisear.
estás siseando
-you are hissing
Present progressivevosconjugation ofsisear.

sisear

INTRANSITIVE VERB
(to make an "s" sound)-to hiss
Synonyms for sisear
protestar
to protest
silbar
to whistle
TRANSITIVE VERB
(to make an "s" sound at)-to hiss at
Synonyms for sisear
chiflar
to hiss at
abuchear
to boo
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