
die Naht
seam
The line where two pieces of fabric, leather, or similar material are joined together by sewing.
Die Naht an meiner Jacke ist aufgegangen.
The seam on my jacket has come undone.
seam
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seam
The line where two pieces of fabric, leather, or similar material are joined together by sewing.
Die Naht an meiner Jacke ist aufgegangen.
The seam on my jacket has come undone.

to be bursting at the seams
To be completely overcrowded; to be too full or too tight.
Die Konzerthalle platzte bei dem Auftritt der berühmten Band aus allen Nähten.
The concert hall was bursting at the seams during the famous band's performance.

suture
The joined area of tissue after an operation or injury that has been closed by stitching.
Der Arzt wird die Fäden der Naht in einer Woche ziehen.
The doctor will remove the stitches from the suture in a week.

joint / seam
The joint or connection point where two solid materials or structural components meet.
An der Naht zwischen den beiden Betonplatten hat sich ein Riss gebildet.
A crack has formed at the joint between the two concrete slabs.
The noun 'die Naht' (the seam) is closely related to the verb 'nähen' (to sew). A seam is the result of sewing.
Kannst du mir helfen, diese Naht zu nähen?
Can you help me sew this seam?
The idiom 'aus allen Nähten platzen' (to be bursting at the seams) is fixed and used figuratively. It describes that a place, a piece of clothing, or even a schedule is overfilled.
Der Bus war so voll, er platzte aus allen Nähten.
The bus was so full it was bursting at the seams.
Common verbs connected with a fabric seam are 'aufgehen' (to come undone), 'reißen' (to tear), or 'platzen' (to burst) when it breaks. A new seam is 'gemacht' (made) or 'gesetzt' (placed/put in).
Die Naht am Ärmel ist leider gerissen.
The seam on the sleeve has unfortunately torn.
You can recognize the medical meaning from words such as 'Arzt' (doctor), 'Operation' (operation/surgery), 'Wunde' (wound), or 'Fäden ziehen' (to remove stitches). Here 'Naht' (suture) is often used as a synonym for the stitched wound.
Nach der Operation hatte ich eine lange Naht am Knie.
After the operation, I had a long suture on my knee.
joint / fugue
With solid materials, both words can refer to a connection point. Naht focuses more on the line where the parts are joined, while Fuge refers to the narrow gap between them. When the focus is on the connection, Naht is used; when it is on the gap, Fuge is used.

Die Naht zwischen den Metallteilen muss an dieser Stelle repariert werden.
The seam between the metal parts needs to be repaired at this point.
Die Fuge zwischen den Fliesen ist an dieser Stelle beschädigt.
The joint between the tiles is damaged at this point.