-tonic
Word Origin
1 
a combining form occurring in adjectives that correspond to nouns ending in -tonia:
catatonic.
Origin
see tonic
| 词汇 | -tonic | 
| 词根词缀 | Dictionary.com -tonicWord Origin 1  a combining form occurring in adjectives that correspond to nouns ending in -tonia: catatonic. Origin see tonic | 
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