die Maus
mouse
A small rodent with a long tail, often regarded as a pest.
Die Katze hat eine Maus gefangen und sie vor die Tür gelegt.
The cat caught a mouse and laid it in front of the door.

mouse
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mouse
A small rodent with a long tail, often regarded as a pest.
Die Katze hat eine Maus gefangen und sie vor die Tür gelegt.
The cat caught a mouse and laid it in front of the door.

The four main meanings of 'Maus' (mouse) are very different. The context always makes clear what is meant: 'klicken' (to click) and 'Computer' (computer) for the device, 'Katze' (cat) and 'Falle' (trap) for the animal, and 'meine kleine' (my little) for the pet name.
Meine neue Computer-Maus hat sieben Tasten.
My new computer mouse has seven buttons.
In the computer context, typical expressions are 'mit der Maus klicken' (to click with the mouse), 'die rechte/linke Maustaste' (the right/left mouse button), and 'eine kabellose Maus' (a wireless mouse). The word 'Mauszeiger' (mouse pointer) refers to the symbol on the screen.
Du musst mit der rechten Maustaste auf das Symbol klicken.
You have to click on the icon with the right mouse button.
As a pet name, 'Maus' (sweetie/little mouse) is very informal and affectionate. It is used for male or female partners or small children, but never in a formal or professional setting.
„Hallo meine Maus, wie war dein Tag?“, fragte er seine Freundin.
'Hello, my sweetie, how was your day?' he asked his girlfriend.
The term for a shy person is almost always used in the fixed expression 'eine graue Maus' (a gray mouse / wallflower). The adjective 'grau' (gray) is a fixed part of the idiom here.
Sie galt lange als graue Maus, bis sie bei der Firmenfeier alle mit ihrem Gesang überraschte.
She was long considered a gray mouse until she surprised everyone with her singing at the company party.
darling / treasure
'Schatz' and 'Maus' can both be affectionate pet names for people. 'Schatz' is very general and works for partners, children, or other loved ones. 'Maus' often sounds especially tender and is frequently used for children or female partners. Both words belong more in private, familiar situations. You would normally not use them in a formal conversation. 'Schatz' emphasizes more strongly that someone is very dear and precious; 'Maus' sounds softer and cuter.

Die Mutter sagt zu ihrer Tochter: „Schlaf gut, kleine Maus.“
The mother says to her daughter, "Sleep well, my little sweetie."
Komm bitte kurz her, Schatz, ich brauche deine Hilfe.
Please come here for a moment, darling, I need your help.