noun, takes する, transitive verb

Honorific or respectful language, humble language.
  1. promise, agreement, arrangement, one's word, contract, pact, appointment, engagement, date.

noun, takes genitive case の

  1. something expected or predictable (e.g. running gag), typical or clichéd development (in a story), something considered obligatory or guaranteed (in a certain situation).

Variations

Pronunciation Kanji Kana Is Common
 
お約束 おやくそく
御約束 おやくそく

Contained Kanji Breakdown

promise, approximately, shrink
ヤク つづ.まる つづま.やか (4th, N3)
thread
いと シ (1st, N2)
short thread radical (no. 52)
ヨウ ちいさい (Kentei 1)
little, small
ショウ こ- ちい.さい (1st, N5)
feathered stick, barb radical (no. 6)
ケツ かぎ (Kentei 1)
eight, eight radical (no. 12)
ハチ や はっ (1st, N5)
ladle, one tenth of a go, dip
シャク (N1)
wrapping enclosure, wrapping radical (no. 20)
ホウ つつ.む (Kentei 1)
dot, tick or dot radical (no. 3)
チュ (Kentei 1)
bundle, sheaf, ream
ソク たば つか (4th, N3)
tree, wood
き モク こ- (1st, N5)
mouth
くち コウ ク (1st, N4)