An electric 'coffee grinder' just for grinding up spices / seeds. Don't use the regular coffee grinder, or your coffee drinking housemates will get super annoyed. The flavor, and nutrition is so much better when you cook with freshly ground spices.
The difference is that you aren't trying to percolate water through spices like you are with coffee, so the grind size isn't so critical. With coffee, if the grind is uneven you end up with "channels" instead of the water flowing through evenly, so some parts of the coffee ends up over-extracted while other parts end up under-extracted, and you end up with more sour and bitter flavors than it's supposed to have.
Or so they say, anyway. I'm not actually a coffee snob myself -- I drink instant with a bunch of cream and sugar, LOL -- I just like James Hoffman YouTube videos.
Try grinding 60ml of flax, sesame, cumin, black cumin, and fenugreek in a mortar /pestle. It's too much work. I'm a tool using primate, and I like powertools. For 5ml, even 20ml hand power is fine. The Chinese developed a thing called a "Brass Boat" for grinding up larger quantities, "manually", actually by foot/ leg power. Alas, I can't seem to find an image for ya.
I have several mortar and pestles and I find them very easy, you don't need to be condescending, I kind of stopped reading your comment after the bitchy start.
Not meaning to be condescending, that's what I grind every morning for my breakfast. I've tried hand grinders, and have a mortar & pestle, but they don't work for me in that use case. shrug
Coffee drinkers, especially before morning coffee can be a tad bit intolerant of one's spice experiments. It's best to not goad the beast, at least until normal / optimal levels of caffienation have been reached, and beauty achieved.
So called Turkish Coffee, which I used to drink on the regular in post grad, has cardamom, which is a great place to start. I'm always game for a little extra flavor. Just a touch of chili powder? Hmm, never tried it, but maybe Nigella sativa / Kalonji/ Black Cumin Seed would be a good add. LMK!