(from Cambridge Advanced Learner's Dictionary)

deliberate (INTENTIONAL) adjective

1 (often of something bad) intentional or planned:

a deliberate attack/insult/lie

We made a deliberate decision to live apart for a while.

2 describes a movement, action or thought which is done carefully without hurrying:

From her slow, deliberate speech I guessed she must be drunk.

deliberately adverb

I'm sure he says these things deliberately (= intentionally) to annoy me.

Calmly and deliberately (= slowly and carefully), she poured petrol over the car and set it alight.

deliberation noun [U]

Slowly and with deliberation she turned to me and told me to get out.