-logy
/ləgɪ/combining form
1
- （常作-ology）denoting a subject of study or interest表示“…科”、“…论”、“…学”：
psychology.
2
- denoting a characteristic of speech or language表示“说话（或语词）的特征”：
eulogy.
2.1
- denoting a type of discourse表示“话语”：
trilogy.
词源
from French -logie or medieval Latin -logia, from Greek.