Sisterhood
来自Big Physics
wiktionary
From Middle English susterhede; equivalent to sister + -hood (with a modification in the suffix).
etymonline
sisterhood (n.)
"state of being a sister," late 14c., from sister + -hood. Meaning "a society of sisters" (usually a religious order) is from 1590s; sense of "women having some common characteristic or calling" is from c. 1600.
