It has already been five years since the former company president passed away.
Upon hearing the news of his passing, I offer my deepest condolences.
お隠れ is the honorific version of 隠れ used specifically for the death of a respected person (as in お隠れになる), while plain 隠れ in this sense is rarely used alone.
Standard honorific noun for someone's passing. The kanji 隠れ is the usual spelling.
Alternate spelling using the honorific prefix 御. Less common than お隠れ.
Irregular kanji usage. The kanji 崩れ is not standard for this word; お隠れ is preferred.
Derived from the honorific prefix お and the noun 隠れ (hiding, concealment), from the verb 隠れる (to hide). The sense of 'passing away' is a euphemistic extension, treating death as a withdrawal from the world.