Send down

• Abdicate
• Resign one's position
• Lower or resign
• Relinquish, as an office
• Resign, as a position
• Fancy way to resign
• Withdraw from office

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1610s (figurative), 1640s (literal), from Latin demittere "to send down," from de- (see de- ) + mittere "to send" (see mission ).

Wiktionary Word definitions in Wiktionary
n. 1 The act of demitting. 2 A document certifying that a person has (honourably) demitted, as from a Masonic lodge. vb. 1 (context transitive English) To let fall; to depress; to yield. 2 To relinquish an office, membership, authority, etc.; to resign, ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Demit \De*mit"\, v. t. [imp. & p. p. Demitted ; p. pr. & vb. n. Demitting .] [L. demittere to send or bring down, to lower; de- + mittere to send. Cf. Demise .] To let fall; to depress. [R.] They [peacocks] demit and let fall the same [i. e., their train]. ...