의성어 [ui-seong-eo] is phonomime, which is to say, an onomatopoeic word, a word that imitates a sound. 의태어 [ui-tae-eo] is phenomime, which differs in that it’s a kind of “sound symbolism” of a feeling rather than an imitative representation. I’ve written about these things before: see here. One of the most common google search terms that brings internauts to my blog randomly is “phenomimes and psychomimes.”
I’ll admit, these things fascinate me. I frequently revisit them. I found a very brief one page pdf summary of them, this morning. And there’s a chapter in Samuel E. Martin’s exhaustive and exhaustingly Yale-ified Korean grammar about them, too (p. 340~344).
I’ll reproduce some interesting vocabulary.
… some phonomimes:
추룩 추루룩 추루룩 [chu-ruk chu-ru-ruk chu-ru-ruk] = downpouringly
보글보글 [bo-geul-bo-geul] / 바글바글 [ba-geul-ba-geul] / 부글부글 [bu-geul-bu-geul] / 뽀글뽀글 [ppo-geul-ppo-geul] / 빠글빠글 [ppa-geul-ppa-geul] / 뿌글뿌글 [ppu-geul-ppu-geul] = boilingly, bubblingly
찰랑찰랑 [chal-lang-chal-lang] / 출렁출렁 [chul-leong-chul-leong] / etc. = lappingly, sloppingly
꽹구랑 꽹꽹깽 [kkwaeng-gu-rang kkwaeng-kkwaeng-kkaeng] = gongingly
… and some phenomimes:
살금살금 [sal-geum-sal-geum] = sneakily
깡충깡충 [kkang-chung-kkang-chung] = bouncily, “hoppingly” (also 깡총깡총[kkang-chong-kkang-chong])
말똥말똥 [mal-ttong-mal-ttong] / 멀뚱멀뚱 [meol-ttung-meol-ttung] = wide-eyed staringly
말랑 몰랑 물렁 [mal-lang mol-lang mul-leong] / 말캉 몰캉 물캉 [mal-kang mol-kang mul-kang] = softly / tenderly (as a texture of food)
살짝 [sal-jjak] / 설쩍 [seol-jjeok] = stealthily
싱글벙글 [sing-geul-beong-geul] = smilingly
날씬 [nal-ssin] / 늘씬[neul-ssin] = slimly, slenderly
통통 [tong-tong] / 퉁퉁 [tung-tung] = plumply
살살 [sal-sal] / 설설 [seol-seol] / 솔솔 [sol-sol] / 술술 [sul-sul] = gently, softly
싹독 [ssak-dok] / 썩둑 [seok-duk] = choppingly, snippingly
빡빡 [ppak-ppak] / 뼉뼉 [ppeok-ppeok] = crustily, tightly, narrow-mindedly
반짝 [ban-jjak] / 번쩍 [beon-jjeok] / 빤짝 [ppan-jjak] / 뻔쩍 [ppeon-jjeok] = sparklingly, twinklingly
A random picture (2010, Gwangju).
[Update (2015-10-08): I decided to create a consolidated list of examples, which I can update periodically.]