überglücklich
overjoyed
A state of extremely great joy and deep happiness.
Sie waren überglücklich, als sie die Zusage für ihre Traumwohnung erhielten.
They were overjoyed when they received the acceptance for their dream apartment.

overjoyed
Loading your saved state.
overjoyed
A state of extremely great joy and deep happiness.
Sie waren überglücklich, als sie die Zusage für ihre Traumwohnung erhielten.
They were overjoyed when they received the acceptance for their dream apartment.

The word is made up of the prefix 'über-' and the adjective 'glücklich' (happy). The prefix 'über-' acts as an intensifier here and means 'extremely' or 'very'. This pattern is also found in other words like 'übermüdet' (overtired) or 'überpünktlich' (excessively punctual).
Nach dem langen Flug war er völlig übermüdet.
After the long flight, he was completely overtired.
To express the reason for the joy, the preposition 'über' with the accusative is often used. The structure is: jemand ist überglücklich über etwas (Akkusativ) (someone is overjoyed about something, accusative).
Der Gewinner war überglücklich über den Hauptpreis.
The winner was overjoyed about the grand prize.
'Überglücklich' (overjoyed) is a very strong and emotional word. It is used for special, life-changing moments, not for small everyday pleasures.
Als er den Heiratsantrag machte, war sie überglücklich.
When he proposed, she was overjoyed.
happy / lucky
'glücklich' and 'überglücklich' both describe joy and satisfaction. The most important difference is intensity. 'glücklich' can be calm, ordinary, or deep. 'überglücklich' means very, very happy or overjoyed, and fits special moments, for example after good news, passing an exam, or the birth of a child. Learners may confuse the words because both point in the same direction. When the joy is strong, visible, and exceptional, 'überglücklich' is more precise. In normal positive situations, 'glücklich' is usually enough.

Nach der bestandenen Prüfung war sie überglücklich.
After passing the exam, she was overjoyed.
Am Wochenende ist Lena glücklich, weil sie endlich Zeit für ihre Freunde hat.
On the weekend, Lena is happy because she finally has time for her friends.