諱

posthumous name

avoiding using a name (naming taboo in ancient China)

semicentennial memorial service

to give offense

one kanji in the name of a nobleperson (with a multiple-kanji name)

(for a nobleman) to bestow one of the kanji in his name upon someone (e.g. meritorious retainer, boy coming of age, etc.)

displeasure

real name (of a deceased person or a noble)