Antonyms of adj inconsequential

2 senses of inconsequential

Sense 1
inconsequent, inconsequential -- (lacking worth or importance; "his work seems trivial and inconsequential"; "the quite inconsequent fellow was managed like a puppet")

INDIRECT (VIA unimportant) -> important, of import -- (of great significance or value; "important people"; "the important questions of the day")

Sense 2
inconsequential -- (not following logically as a consequence)

INDIRECT (VIA illogical) -> logical -- (capable of or reflecting the capability for correct and valid reasoning; "a logical mind")

Similarity of adj inconsequential

2 senses of inconsequential

Sense 1
inconsequent, inconsequential -- (lacking worth or importance; "his work seems trivial and inconsequential"; "the quite inconsequent fellow was managed like a puppet")
       => unimportant (vs. important) -- (not important; "a relatively unimportant feature of the system"; "the question seems unimportant")

Sense 2
inconsequential -- (not following logically as a consequence)
       => illogical (vs. logical), unlogical -- (lacking in correct logical relation)