Synonym: Byzantine, baffling, convoluted, gnarled, gnarly, involved, knobbed, knotted, problematic, problematical, snarled, snarly, tangled, tortuous, tough. Similar words: dotty, potty, knotted, nitty-gritty, patty, witty, petty, fatty. Meaning: ['nɑtɪ /nɒ-] 
adj. 1. making great mental demands; hard to comprehend or solve or believe 2. used of old persons or old trees; covered with knobs or knots 3. highly complex or intricate 4. tangled in knots or snarls.
adj. 1. making great mental demands; hard to comprehend or solve or believe 2. used of old persons or old trees; covered with knobs or knots 3. highly complex or intricate 4. tangled in knots or snarls. 
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31. How to stop the communication of network eroticism, is a world topic and knotty problem.
32. A knotty-pine grandfather-clock business may sound great, but what if there's only one source of knotty pine?
33. Field application shows that nanometer blocking agent is a new method for the simplified string of knotty injectors in high-temperature high-pressure and low permeability reservoirs.
34. As a result, legislator employ various procedual devices to handle knotty problems.
35. Corrosion from naphthenic acid has been one of the knotty problems in petroleum processing industry.
36. It has a website, but it still has to unlace the knotty problem facing all weeklies trying to manage themselves into an online future — what does a Web-based weekly look like?
37. Mrs. Wu Sun - fu looked suddenly worried, as if she was wrestling with some knotty problem.
More similar words: dotty, potty, knotted, nitty-gritty, patty, witty, petty, fatty, ditty, pretty, gritty, pretty much, knot, known, know, knob, unknown, knock, knoll, known as, knowing, gettysburg address, know about, well known, well-known, knock off, knock out, knockoff, for all I know, knocking.