壓扁：東西讓開、失去形狀
取核心畫面裡「變形」的那一半。
verb · B2
To press something soft, and often wet, until it is flattened or loses its shape; also, to be pressed flat in this way.
壓扁；擠扁
核心畫面
One way to hold this word: press down on something soft and wet, and two things happen at once. It loses its shape, and it makes a small wet sucking noise as it gives way. Bread in a bag, mud under a boot, a ripe tomato in your hand. English lets you pick either half. Take the and you get the squish that ruins your sandwich. Take the noise and you get the squish of wet shoes down a corridor.
squish 可以想成：往一樣又軟又濕的東西壓下去，同時發生兩件事。它變形了，而且在讓開的時候發出一小聲濕濕的吸吮聲…更多收起
squish 可以想成：往一樣又軟又濕的東西壓下去，同時發生兩件事。它變形了，而且在讓開的時候發出一小聲濕濕的吸吮聲。包包裡的麵包、靴子下的爛泥、手裡熟透的番茄，都是這個畫面。英文讓你挑其中一半來用。取「變形」那一半，就是把三明治壓扁的那個 squish。取「聲音」那一半，就是濕鞋子走在走廊上一路響的那個 squish。From the word’s history
Apparently an alteration of squash, influenced by the obsolete word squiss meaning to squeeze, and related to squeeze and squelch.
看來是 squash（壓扁）變化出來的字，並受到已廢棄的舊字 squiss（擠）影響，跟 squeeze、squelch 同屬一家。
packet evidence: Wiktionary etymology_text for squish (alteration of squash, influenced by obsolete squiss; compare squeeze, squelch)
Two branches
聲音：濕軟的東西被擠出的那一下
取核心畫面裡「聲音」的那一半，動詞和名詞各講一種角度。
verb · B2
To move in or through something soft and wet, making a soft wet sucking sound; also used of the thing itself making that sound.
（在濕軟的東西裡）發出噗滋聲地移動