SENSELESSLY
mindlessly, senselessly
(adverb) in an unreasonably senseless manner; “these temples were mindlessly destroyed by the Red Guards”
senselessly
(adverb) in a meaningless and purposeless manner; “these innocent bystanders were senselessly killed”
Source: WordNet® 3.1
Etymology
Adverb
senselessly (comparative more senselessly, superlative most senselessly)
In a senseless manner.
Source: Wiktionary
SENSELESS
Sense"less, a.
Definition: Destitute of, deficient in, or contrary to, sense; without
sensibility or feeling; unconscious; stupid; foolish; unwise;
unreasonable.
You blocks, you stones, you worse than senseless things. Shak.
The ears are senseless that should give us hearing. Shak.
The senseless grave feels not your pious sorrows. Rowe.
They were a senseless, stupid race. Swift.
They would repent this their senseless perverseness when it would be
too late. Clarendon.
--- Sense"less*ly, adv.
– Sense"less*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition