Aufwachen vs. erwachen
The German verbs aufwachen and erwachen both translate to to wake up. However, they are not always interchangeable. The primary difference lies in their register and context, with aufwachen being the common, everyday term and erwachen being more formal, poetic, and often used in a figurative sense.
Aufwachen
A1Aufwachen is the standard, neutral verb for the daily act of waking up from sleep. It describes the physical process of ceasing to sleep and becoming conscious. It is the word you would use in most everyday conversations.
Ich wache jeden Morgen um sieben Uhr auf.
(I wake up every morning at seven o'clock.)
Bist du vom Lärm in der Nacht aufgewacht?
(Did you wake up from the noise during the night?)
Das Kind ist aufgewacht und hat angefangen zu weinen.
(The child woke up and started to cry.)
Manchmal wache ich mitten in der Nacht auf und kann nicht wieder einschlafen.
(Sometimes I wake up in the middle of the night and can't fall back asleep.)
Er wachte in einem ihm unbekannten Zimmer auf.
(He woke up in a room unfamiliar to him.)
Erwachen
B2Erwachen is a more elevated, formal, or poetic word for to wake up. While it can describe the physical act, it often implies a more profound, gentle, or dramatic awakening, such as from a deep sleep or a coma. Most significantly, erwachen is frequently used in a figurative or metaphorical sense, referring to the awakening of nature, feelings, or consciousness.
Dornröschen erwachte nach hundert Jahren aus ihrem tiefen Schlaf.
(Sleeping Beauty awoke from her deep sleep after a hundred years.)
Im Frühling erwacht die Natur zu neuem Leben.
(In spring, nature awakens to new life.)
Als er ihre Stimme hörte, erwachte seine alte Liebe für sie wieder.
(When he heard her voice, his old love for her awakened again.)
Nach dem Koma ist er langsam wieder erwacht.
(He slowly awoke again after the coma.)
Ein neues Bewusstsein für die Umwelt erwacht in der Gesellschaft.
(A new awareness for the environment is awakening in society.)
Summary
In essence, use aufwachen for the regular, daily process of waking up from sleep. Use erwachen for more formal, literary, or dramatic contexts, like in fairy tales or when waking from a coma. Erwachen is also the correct choice for metaphorical awakenings, such as the awakening of nature in spring, the dawning of an idea, or the stirring of feelings.