non

1. no, not, not at all
2. no (used to show disagreement or negation)
3. no (used to reinforce an affirmation as negation of the alternative - but it can be omitted without changing the meaning)
4. no (reinforces a mandate in interrogative sentences)

é

is; third-person singular present indicative of ser

tan

so, as (in comparisons)

complicado

past participle of complicar