He won't do any work that he considers 'beneath' him. [=work that he thinks is not good enough for a person of his social class]
He thought washing dishes was 'beneath his dignity'. [=he thought that he was too good or important to wash dishes]
The chair sagged 'beneath' [='under, underneath'] his weight. [=his weight caused the chair to sag]
(..) for secrecy might prevail. The prospect of death is strong motivation. It is here. In Paris, Teacher. It hides beneath the Rose in Saint-Sulpice. You will go forth, Silas. I chastise my body. Capitaine Fache is waiting for you. Okay. (..)2006 The Da Vinci Code
(..) Wait! My God, forgive me. In the sacristy... ...the church of Saint-Sulpice, is the Rose Line. Beneath the Rose. Thank you. Thank you. Thank you. Symbols are a language that can help us understand our past. (..)2006 The Da Vinci Code