annotation
n.
mid-15c., from Latin annotationem (nominative annotatio), noun of action from past participle stem of annotare "to add notes to," from ad- "to" (see ad-) + notare "to note, mark" (see note, v.).
〔李〕[an-(ad-)=at在；not=to mark标明；-ation n.=the act表行为→“marking at the point在要点处标明”→] n.① writing of notes or explanation 做注解或注释