CREATE TABLE table_21712 ("Class" TEXT, "Part 1" TEXT, "Part 2" TEXT, "Part 3" TEXT, "Part 4" TEXT, "Verb meaning" TEXT)

What is the meaning of the class 6 verbs?
SELECT "Verb meaning" FROM table_21712 WHERE "Class" = '6'
SELECT "Verb meaning" FROM "table_21712" WHERE "Class" = '6'