[げん, gen](n) (1) { math } unknown (e.g. in an equation); (2) { math } element (of a set); (3) yuan (monetary unit of China); (4) Yuan dynasty (China)#170[Add to Longdo]
[くらい, kurai](adj-i) (1) (uk) dark; gloomy; (2) dark (in colour); dull; (3) depressed; dispirited; (4) sorrowful; bitter (as in a dark past); (5) unclear; unfamiliar; unknown; (P)#11952[Add to Longdo]
[さぐる, saguru](v5r, vt) (1) to feel around for; to fumble for; to grope for; to search for; to look for; (2) to investigate; to probe into; to spy on; to sound out; (3) to explore (parts unknown); to enjoy (natural beauty); (P)#13178[Add to Longdo]