Adjective
jejune -
displaying or suggesting a lack of maturity; "adolescent insecurity" ; "jejune responses to our problems" ; "their behavior was juvenile" ; "puerile jokes"
adolescent ,
juvenile ,
puerile
immature not yet mature
jejune -
lacking interest or significance or impact; "an insipid personality" ; "jejune novel"
insipid
uninteresting characteristic or suggestive of an institution especially in being uniform or dull or unimaginative; "institutional food"
jejune -
lacking in nutritive value; "the jejune diets of the very poor"
insubstantial
unwholesome detrimental to physical or moral well-being; "unwholesome food" ; "unwholesome habits like smoking"
