0 a mother:
1 to say nothing about a subject:
3 short form ofchrysanthemum
It was lovely to see your mum and dad at the school concert last night.
Syncope applies to the base so that the first syllable, mum, contains all of the first morpheme and some of the second.
All those leftists who cry out for more freedoms keep mum on this topic.
It's like getting a dressing down from my mum.