frightening

interesting / interested exciting / excited surprising / surprised frightening / frightened boring / bored

intéressant / intéressé excitant / excité surprenant / surpris effrayant / peur ennuyeux / s'ennuyer

it frightening

il effrayant

more frightening

plus effrayant

Truly frightening

Vraiment effrayant

it's frightening

ce est effrayant

Frightening sound

Son effrayant

Frightening dreams

PARONIRIE

It is frightening.

Il y a de quoi s' inquiéter.