kumquat
A kumquat is one syllable of Cantonese followed by a spelling rule that has nothing to do with Cantonese. The sound is KUM-kwot, plain and short, but the kw at the front of the second syllable has to be written qu, and the first vowel sits in the part of English where u can go two ways.
K-U-M-Q-U-A-T · Citrus japonica
The word came into English through Cantonese, where gam gwat means golden orange. English kept the two syllables of the Cantonese and then wrote the second one the way English always writes that sound, with qu. So a Cantonese fruit ended up carrying a Norman spelling convention.
A small oval citrus with a sweet rind and sour flesh, eaten whole. The tree is compact and takes frost better than an orange, which is why it turns up in pots on terraces well north of the citrus belt.