die Schleife
bow
A knot with two or more loops, often tied from a ribbon, cord, or shoelaces, and which can be both decorative and functional.
Das kleine Mädchen lernte gerade, eine Schleife zu binden.
The little girl was just learning to tie a bow.

bow / loop
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bow
A knot with two or more loops, often tied from a ribbon, cord, or shoelaces, and which can be both decorative and functional.
Das kleine Mädchen lernte gerade, eine Schleife zu binden.
The little girl was just learning to tie a bow.

You can often recognize the meaning of 'Schleife' (bow/loop) from the verb: 'eine Schleife binden' (to tie a bow) refers to a knot, 'eine Schleife fahren' (to make/drive a loop) to a detour, and 'in einer Schleife laufen lassen' (to let run in a loop) to repetition in music or technology.
Kannst du mir helfen, die Schleife an meinem Kleid zu binden?
Can you help me tie the bow on my dress?
When it refers to a knot, 'Schleife' (bow) is often used with the verbs 'binden' (to tie) or 'machen' (to make). Typical contexts are shoes, gifts, or clothing.
Er band eine schöne Schleife um das Geschenkpaket.
He tied a beautiful bow around the gift package.
In the meaning of a detour, 'Schleife' (loop) is combined with verbs of movement such as 'fahren' (to drive/go), 'gehen' (to go/walk), or 'laufen' (to run/walk). The size of the loop is often described with adjectives like 'groß' (big) or 'klein' (small).
Die Joggingstrecke macht eine kleine Schleife um den See.
The jogging route makes a small loop around the lake.
This meaning is typical in technical or musical contexts. A very common expression is 'in einer Endlosschleife' (in an endless loop), which means that something is repeated without interruption.
Der Code hing in einer Endlosschleife fest und das Programm stürzte ab.
The code got stuck in an endless loop and the program crashed.
round
'die Runde' and 'die Schleife' can both describe a route that does not simply go straight from A to B. 'die Runde' is used more for a walk or drive where you visit several points or check them regularly. 'die Schleife' describes the shape of the route more strongly: it makes a curve and often leads back again. Learners may confuse the words when talking about routes. A practical tip: you make 'eine Runde' (a round); 'eine Schleife' (a loop) is more the shape of the route.

Der Wanderweg macht hinter dem See eine Schleife und führt dann zum Parkplatz zurück.
The hiking trail makes a loop behind the lake and then leads back to the parking lot.
Der Hausmeister macht jeden Abend eine Runde durch das Gebäude.
The caretaker makes a round through the building every evening.