zhè / ge / zì / shǒu / biǎo / shì / fǒu / dìng / suǒ / yǐ / zhěng / ge / dān / cí / de / yì / si / yě / fā / shēng / le / biàn / huà

这个字首表示否定，所以整个单词的意思也发生了变化。

This prefix indicates negation, so the meaning of the whole word has changed as well.