
der Stich
sting / puncture
The penetration of a pointed object (e.g., needle, knife, insect stinger) into something, as well as the wound or mark caused by it.
Ein Wespenstich am Hals kann gefährlich sein.
A wasp sting on the neck can be dangerous.
sting / stitch
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sting / puncture
The penetration of a pointed object (e.g., needle, knife, insect stinger) into something, as well as the wound or mark caused by it.
Ein Wespenstich am Hals kann gefährlich sein.
A wasp sting on the neck can be dangerous.

stitch
A sudden, sharp pain in a part of the body.
Beim schnellen Laufen spürte ich plötzlich einen Stich in der Seite.
While running fast, I suddenly felt a stitch in my side.

to abandon
To leave someone alone in a difficult situation, denying them the help or support they expected.
Als ich Hilfe brauchte, haben mich meine besten Freunde einfach im Stich gelassen.
When I needed help, my best friends simply abandoned me.

trick
A round in certain card games in which each player plays one card and the player with the highest card wins the round.
Beim Skat ist es wichtig, die entscheidenden Stiche zu machen.
In Skat, it is important to win the decisive tricks.

stitch
A specific way of sewing or embroidering with a needle and thread.
Sie lernt gerade den Kreuzstich für ihre neue Stickerei.
She is currently learning cross-stitch for her new embroidery project.

tinge
A slight, barely noticeable admixture of another color; a shade of color.
Das Weiß der Wand hat einen leichten Stich ins Gräuliche.
The white of the wall has a slight grayish tinge.

stab
A figurative term for a hurtful, wounding remark or action.
Seine spöttische Anmerkung war ein Stich mitten ins Herz.
His mocking comment was a stab straight to the heart.
The noun 'der Stich' (sting/stitch) is directly derived from the verb 'stechen' (to sting/prick/stab). This connection helps you understand many meanings: an insect stings, a knife stabs, and a sudden pain feels like a stitch.
Die Biene hat mich gestochen und der Stich tut weh.
The bee stung me, and the sting hurts.
The context reveals the meaning: if it is about insects or weapons, it refers to a wound. If it is about the body, it means a pain. In card games it is a round, and with colors it is a shade or tinge.
Der Stich der Mücke juckt fürchterlich.
The mosquito bite itches terribly.
In this meaning, 'Stich' (sting/puncture) is often combined with its cause. Typical compounds are 'Mückenstich' (mosquito bite), 'Wespenstich' (wasp sting), or 'Nadelstich' (needle prick). For injuries, people also speak of a 'Stichwunde' (stab wound).
Ein Mückenstich ist meist harmlos, aber lästig.
A mosquito bite is usually harmless but annoying.
When 'Stich' (stitch) describes a pain, the affected body part is often named with 'in' + dative. Common phrases are 'ein Stich in der Seite' (a stitch in the side), 'ein Stich im Rücken' (a sharp pain in the back), or metaphorically 'ein Stich ins Herz' (a stab to the heart).
Beim Atmen spüre ich einen leichten Stich in der Brust.
When I breathe, I feel a slight stitch in my chest.
The idiom 'jemanden im Stich lassen' (to abandon someone / leave someone in the lurch) is fixed. The person who is left alone is always in the accusative.
Du kannst dich auf mich verlassen, ich lasse dich nicht im Stich.
You can rely on me; I won't abandon you.
In the context of card games like Skat or bridge, 'Stich' (trick) means a round of play. Typical verbs in this context are 'einen Stich machen' (to take a trick) or 'einen Stich gewinnen' (to win a trick).
Mit dem höchsten Trumpf hat sie den wichtigen Stich gemacht.
With the highest trump card, she took the important trick.
To describe a color nuance, the construction 'einen Stich ins [Farbe] haben' (to have a tinge of [color]) is used. The color is in the accusative after 'ins'.
Das Hemd ist nicht rein weiß, es hat einen Stich ins Bläuliche.
The shirt is not pure white; it has a bluish tinge.
Similar to physical pain, 'Stich' (stab) can also describe a sudden emotional injury caused by words or actions. The most common phrase for this is 'ein Stich ins Herz' (a stab to the heart).
Jedes seiner kalten Worte war ein Stich für sie.
Each of his cold words was a stab for her.
round
Runde and Stich can both refer to a section of a card game. A Stich is the specific part of the game in which each player plays one card; Runde, by contrast, can refer to a larger section of the game. For a single sequence of cards played, Stich is the more precise term.

Im nächsten Stich spielte jeder der vier Skatspieler genau eine Karte aus.
In the next trick, each of the four skat players played exactly one card.
Nach einer Runde Skat lagen noch viele Karten auf dem Tisch.
After one round of skat, many cards were still on the table.