inconsiderable

From in- +‎ considerable.

inconsiderable (comparative more inconsiderable, superlative most inconsiderable)

1. Too unimportant to be worthy of attention.

   Synonyms: negligible, trivial, unconsiderable; see also Thesaurus:insignificant

   • 1660, [Richard Allestree], “Sect[ion] V. Of the Second Advantage, Wealth.”, in The Gentlemans Calling, London: […] T[imothy] Garthwait […], →OCLC, page 83:

     [N]o attempt is made to call in God to their reſcue, as if he vvere an idle unconcern'd ſpectator of humane affairs, or ſo inconſiderable an ally, as not to be vvorth the care of engaging him on their ſide.

2. Impossible to consider as a possibility; inconceivable.
   • 1996 December 7, ladyv, “The GPM and Alan Walters (fwd)”, in alt.clearing.technology‎ (Usenet):

     It is not inconsiderable to me that all the above can simultaneously exist.