Brian is great in Chinese I think. but some obvious mistake appeared in the answer. 牵强，is just like "farfetched" in English. means - If you describe a story or idea as "牵强", you are criticizing it because you think it is unlikely to be true or practical.

Hi Simona - 牵, as you can tell from the character for "cow" (牛) underneath, came from the action of "puling a cow" along with a rope. It originally meant to tie a leash to a cow and lead it along. These days, it means also means to "hold hands" (牵手), to connect/be connected (牽連), to pull along (牵引), to be strained (牵强) (think how a rope gets strained if you pull it very tight), to force and control 牵制 (think about controlling an animal by leashing it and controlling its movement), etc.

牽鼻子 比喻一方要按照另一方的意思行事。 如：「做人要有自己的意見，不要讓人牽鼻子走。」 牽肚掛腸 比喻十分操心﹑掛念。 如：「他接到家中告急的電話之後，一路上牽肚掛腸，巴不得早點兒回家。」 牽一髮而動全身 比喻更動一小部分，即影響全局。 如：「這部機器一旦停止，整個生產線就無法運作，可以說是牽一髮而動全身。」 牽強附會 硬把不相干的事物湊合在一起，勉強比附。 如：「牽強附會的事，還需要自己用心思考，仔細分辨，才不會被騙。」 牽豬哥 舊時，臺灣、閩南一帶稱專門提供種豬給母豬交配的行業。業者通常手持竹竿，並以吹笛子為信號，趕著大公豬在鄉村巡迴，故稱為「牽豬哥」。(豬"哥"是指豬， 非指人 ) 引申義 : 搓合性交易。

Hi Simona ,let me try to answer your question , 牵 is usurally used as a verb, means lead along (by holding the hand, the halter, etc.) "Let me hold your hand." in Chinese we can say "让我牵着你的手吧。"

两对男女在街上手牵着手一起往前走。