Plural form of challis; multiple pieces, bolts, or varieties of challis fabric.
Regular plural of challis (from French 'châlis') formed by adding the plural suffix -es instead of -s due to the word ending in 's'. The -es creates a new syllable in pronunciation.
The plural 'challises' shows English's pronunciation rule: words ending in 's' sounds add -es to create a pronounceable syllable (like 'buses,' 'glasses'), rather than just adding 's' which would be hard to say.
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