to stop yourself from expressing something
detenerse de expresar algo (detenerse de expresar algo)
"He wanted to tell her everything but held back his words."
"Él quería decirle todo, pero se contuvo de sus palabras." (Él quería decirle todo, pero **se contuvo** de sus palabras.)
to have the same opinion as someone else
to show appreciation by praising or encouraging someone
to focus deeply on something to forget stress
to become extremely scared or panicked
to lose control over your emotions and start crying
to remove dust from something