1. 格变化：declassify 不机密 | declension 格变化 | declinable 格变化的

2. 词尾变化：declension 格变化 | declension 词尾变化 | declinable 格变化的

3. (名詞,代詞,形容詞)詞尾變化;變格：declaring 宣告行為 | declension (名詞,代詞,形容詞)詞尾變化;變格 | declinable 可變格

4. 词尾变化/格变化/倾斜/衰退：declassify /不再当机密文件处理/从机密表删除/ | declension /词尾变化/格变化/倾斜/衰退/ | declinable /格变化的/

noun

1. a class of nouns or pronouns or adjectives in Indo-European languages having the same (or very similar) inflectional forms

e.g. the first declension in Latin

2. a downward slope or bend

Synonym: descentdeclivityfalldeclinedeclinationdownslope

3. process of changing to an inferior state

Synonym: deteriorationdecline in qualityworsening

4. the inflection of nouns and pronouns and adjectives in Indo-European languages