aimless
purposeless
one word meaning lacking detail depending on the context of its use would be "spacey." as in "that explanation was kinda spacey." ~VAGUE is a good word meaning "Lacking Detail"~
There are several. One is ne'er-do-well
Words that mean 'lacking enthusiasm' are lackadaisical or apathetic.
The word "colorless" includes a suffix ("-less") that means lacking or without.
The word you are looking for is "ridiculous."
lifeless, sluggish
The word in Greek is Idiotes meaning a person lacking in professional skil
You would add the suffix -less meaning without or lacking, to make "senseless."
The word is "Bereft".
"Lackluster" means lacking in brightness, excitement, or interest. It describes something that is dull, unimpressive, or uninspiring.
There is one six letter word that can be spelled from "romala" which is amoral. The meaning of the word is "lacking a sense of wrong or right"