unsackable

As a noun terms

is .

As an adjective unsackable is

impossible to sack (expel from one's job).

As adjectives the difference between unsackable and unpackable

is that unsackable is impossible to sack (expel from one's job) while unpackable is not packable.

As adjectives the difference between unsackable and unhackable

is that unsackable is impossible to sack (expel from one's job) while unhackable is (computing) not hackable; that cannot be hacked or broken into.

As a noun sack

is a bag; especially a large bag of strong, coarse material for storage and handling of various commodities, such as potatoes, coal, coffee; or, a bag with handles used at a supermarket, a grocery sack; or, a small bag for small items, a satchel.

As a verb sack

is to put in a sack or sacks.

As an adjective unsackable is

impossible to sack (expel from one's job).