honorific affix (imperial)
Attached to words related to the emperor or imperial family; can be a prefix or suffix. Used in formal, respectful contexts.
御製の詩を拝読する。
I read a poem composed by the Emperor.
御名を口にするのは恐れ多い。
It is awe-inspiring to utter His Majesty's name.
honorific prefix
General honorific prefix, but usage is limited and often replaced by お/ご in modern Japanese. Appears in certain fixed expressions.
御礼を申し上げます。
I express my gratitude (humble/honorific).
お is the common honorific prefix used in everyday polite speech, whereas 御（ぎょ）is a formal, specialized reading tied to imperial or classical vocabulary.
control (of a machine, device, etc.) · control (over an opponent, emotions, etc.); governing; management; suppression; keeping in check
defense; protection; safeguard
imperial visit; imperial outing
imperial garden
name of the emperor
death (of an emperor); demise
your will; your wish; your pleasure · certainly; as you say; you are quite right
coachman; driver of a horse-drawn carriage
transfer of a sacred object; shrine procession · imperial procession
The kanji 御 is used for honorific expressions. The reading ぎょ is the on'yomi and appears in formal, often imperial-related vocabulary.
Imperial treasures
drive (a horse, carriage) · control; manage
control; govern; manage
dismounting (polite)
emperor's return to the imperial palace
emperor's arrival; imperial attendance
drive (a horse, carriage) · control; manage
imperial reign
court banquet; imperial banquet
New Year's greetings
thoughts; feelings
imperial seal; privy seal
imperial garments; clothing of the emperor