Shan'do

Shan'do is a title of respect in the language of the night elves (Darnassian) meaning "honored teacher".

It is the title by which Archdruid Malfurion Stormrage is addressed, both by druids and by others, such as Warden Maiev Shadowsong. It was also the title by which Malfurion addressed the demi-god Cenarius, and occasionally used by Illidan whilst under Rhonin's tutelage during the War of the Ancients.

The complementary honorific is thero'shan.

During the Burning Legion's third invasion, the druid adventurer became Archdruid of the Dreamgrove and they became referred to as Shan'do.

In Hearthstone
In Hearthstone's HS Trial by Felfire, HS Aranna Starseeker refers to HS Illidan Stormrage as shan'do.

The following cards refer to the term shan'do:
 * HS Shan'do's Lesson
 * HS Shan'do Malfurion
 * HS Shan'do Wildclaw

Speculation
As the word shan is present in both words, it likely means honored in Darnassian. Given that Shan'do means "honored teacher" and Thero'shan "honored student", the placement of Shan first in Shan'do may indicate an emphasis on honored reflecting the teacher's superiority to the student.