My 20-month-old can say a load of fruits and vegetables reasonably well*, but for cucumber he says “cumbercap”. We can even ask him to say it in parts “cu”, “cum”, “ber”, then when we say it all together he repeats “cumbercap”
*I know this sounds like a humble brag, but I’m not meaning it to! He’s 20 months so can’t talk for shit, but I wanted to make this point to emphasise why ‘cumbercap’ is funnier!