senselessness

adjective

1. destitute or deprived of sensation; unconscious.
2. lacking mental perception, appreciation, or comprehension.
3. stupid or foolish, as persons or actions.
4. nonsensical or meaningless, as words: This letter is either cryptic or senseless.

adjective

1. lacking in sense; foolisha senseless plan
2. lacking in feeling; unconscious
3. lacking in perception; stupid

adj.1550s, “without sensation,” from sense (n.) + -less. Of actions, etc., “devoid of purpose, proceeding from lack of intelligence,” it is attested from 1570s. Related: Senselessly; senselessness.