a certain, an, any, any one, atomic, austere, bare, basic, called for, chaste, deep-seated, either, elementary, esoteric, essential, exclusive, fundamental, homely, homespun, homogeneous, immanent, implanted, implicit, inalienable, indicated, indispensable, individual, indivisible, indwelling, inextricable, infixed, ingrained, inherent, inner, integral, internal, intrinsic, inward, inwrought, irreductible, irreplaceable, lone, mere, monadic, monistic, monolithic, necessary, needed, needful, of a piece, one, plain, prerequisite, primal, primary, private, pure, pure and simple, required, requisite, resident, secret, severe, simon-pure, simple, single, singular, sole, solid, solitary, spare, stark, subjective, unadorned, unalienable, unanalyzable, unchallengeable, uncluttered, undifferenced, undifferentiated, undivided, unforgoable, uniform, unique, unitary, unquestionable, unsolvable, vital, wanted, whole