knotty

1. (figuratively)Examples: "a knotty problem"; "crop-headed, short-haired"; "As for the Paſſions and Studies of the Minde, Auoid Enuie; Anxious Feares; Anger fretting invvards; Subtill and knottie Inquiſitions; Ioyes, and Exhilarations in Exceſſe; Sadneſſe not Communicated."Synonyms: intricate, thorny, complex, complexed, complicate, complicated, convoluted, GordianAntonyms: simple, uncomplicatedfiguratively

2. (figuratively)Examples: "[A] witte in youth, that is not ouer dulle, heauie, knottie and lumpiſhe, but hard, rough, and though ſomwhat ſtaffiſhe, […] ſuch a witte I ſay, if it be, at the firſt well handled by the mother, and rightlie ſmothed and wrought as it ſhould, not ouerwhartlie, and against the wood, by the ſcholemaſter, both for learning, and hole courſe of liuing, proueth alwaies the beſt."; "[…] I may erre perhaps in ſoothing my ſelfe that this preſent truth reviv'd, vvill deſerve on all hands to be not ſiniſterly receiv'd, […] but vvith a ſmooth and pleaſing leſſon, vvhich receiv'd hath the vertue to ſoften and diſpell rooted and knotty ſorrovves: […]"figuratively