unbewusst
unconsciously
Something happens or is done without one noticing it, thinking about it, or intentionally controlling it.
Er hat sie mit seiner Bemerkung unbewusst gekränkt.
He unconsciously hurt her with his comment.

unconscious / unconsciously
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unconsciously
Something happens or is done without one noticing it, thinking about it, or intentionally controlling it.
Er hat sie mit seiner Bemerkung unbewusst gekränkt.
He unconsciously hurt her with his comment.

The word consists of the prefix 'un-' and the adjective 'bewusst' (aware, conscious). The prefix 'un-' negates the meaning of 'bewusst' (aware, conscious) and therefore means 'not conscious' or 'not aware'.
Viele unserer täglichen Handlungen laufen unbewusst ab.
Many of our daily actions happen unconsciously.
In everyday language, 'unbewusst' (unconscious/unconsciously) usually means 'unintentionally' or 'without noticing it'. In texts about psychology or therapy, it refers to the psychological concept of the unconscious.
Er hat unbewusst immer wieder den gleichen Fehler gemacht.
He unconsciously made the same mistake again and again.
'Unbewusst' (unconsciously) is very often used as an adverb to describe a verb. It answers the question 'How did something happen?' and then usually stands directly before or after the verb.
Sie hat ihn unbewusst an eine Person aus ihrer Kindheit erinnert.
She unconsciously reminded him of a person from his childhood.
The noun 'das Unbewusste' (the unconscious) is formed from the adjective 'unbewusst' (unconscious). This is a central term in psychology and refers to the part of the psyche that is not directly accessible to consciousness.
Sigmund Freud hat die Bedeutung des Unbewussten für unser Verhalten erforscht.
Sigmund Freud researched the importance of the unconscious for our behavior.
conscious / deliberate
'bewusst' and 'unbewusst' are opposites. 'bewusst' means that someone does something deliberately or is clear about something. 'unbewusst' means that something happens without someone noticing it, controlling it, or thinking about it. Learners may confuse the words because both have to do with thinking and perception. The direction is important: with 'bewusst', the person is mentally involved; with 'unbewusst', something happens more automatically or without clear intention.

Bei der Bewerbung sprach meine Freundin unbewusst sehr leise.
During the job application, my friend unconsciously spoke very quietly.
Herr Demir nutzt bewusst einfache Wörter, damit der Kurs ihn versteht.
Mr. Demir deliberately uses simple words so that the class understands him.