section
/ˈsekʃən/·섹션·noun
a part of something larger
LatinCEFR A2
Root
Latin 'secare' (to cut) + -tion (act, result)
Latin sectio (a cutting) → Old French section → English section (16th c.)
In a word
Latin secare = 'to cut'. The sect family splits by way of cutting — sect-ion (a cut piece), dis-sect (cut apart = dissect), inter-sect (cut across each other = intersect), sect-or (a cut field = industry sector). Even in-sect (cut into segments = insect) is family — bugs are named "the cut-up ones." A "section" of a book is, by root, just a slice carved out.
Examples
The fiction section is upstairs.
Read section three before the meeting.
A cross-section shows internal layers.
Related
dissectintersectsectorinsectsectional