1) Abase oneself 2) Act obsequiously 3) Act servile 4) Act the toady 5) Beg shamelessly 6) Bend 7) Cower 8) Crawl 9) Creep 10) Cringe 11) Debase oneself 12) Display servility 13) Fawn 14) Flex 15) German lover forced to creep 16) Humble oneself shamelessly 17) Kowtow 18) Show submission or fear 19) Show subservience 1) Beg 2) Cower 3) Crawl 4) Eat dirt 5) Kowtow 
• (adv.) To tend toward, or delight in, what is sensual or base; to be low, abject, or mean. • (adv.) To creep on the earth, or with the face to the ground; to lie prone, or move uneasily with the body prostrate on the earth; to lie fiat on one`s belly, expressive of abjectness; to crawl.
Grov'el intransitive verb [ imperfect & past participle Groveled or Grovelled ; present participle & verbal noun Groveling or Grovelling .] [ From Middle English grovelinge , grufelinge , ...
crawl humble oneself 
[Intelligent words] show submission or fear