TO UNDERSTAND

Arabic 

فهم, ‏تفهم (get along with, give to understand, take up with smb.). (various references)

Aymara

amuyaña. (various references)

Breton

kompren. (various references)

Chinese 

理解 (understanding), 了 (to know), 懂得 (to comprehend, to know), 懂 (to know), 明白 (clear), 明 (bright, clear, next). (various references)

Czech

je to srozumitelné (it is easy to understand). (various references)

Dutch

verminderde verstaanbaarheid (deterioration of ability to understand words). (various references)

Finnish

vaikeatajuinen (hard to understand), vaikeaselkoinen (abstruse, hard to understand), minun annettiin ymmärtää (I was given to understand), helppotajuinen (easy to understand, popular), helposti ymmärrettävä (easy to understand, readily understandable), annoin hänen ymmärtää (I gave him to understand). (various references)

French

comprendre. (various references)

German

verstehen (understand, understanding). (various references)

Greek 

επιδείνωση της δυνατότητας κατανόησης της ομιλίας (deterioration of ability to understand words). (various references)

Haitian Creole

konprann (understand). (various references)

Hungarian

hozzágondol (understood), hozzáért (understood), értesül (hear, to learn, understood). (various references)

Inuktitut

tukisivaa. (various references)

Irish

thuiscint. (various references)

Italian

comprendere (realize, understand, comprehend, grasp), capire (understand, realize). (various references)

Japanese Kanji 

知る (to be acquainted with, to feel, to know), 悟る (to attain enlightenment, to discern, to perceive). (various references)

Japanese Katakana 

がてんがいく (to make out), ききとる (to catch, to follow), しる (broth, juice, sap, soup, to be acquainted with, to feel, to know), くみとる (to pump out, to scoop out), さとる (to attain enlightenment, to discern, to perceive), うかがいしる (to perceive), うけとる (to accept, to get, to interpret, to receive, to take), ふくむ (duty, public service, to be charged or loaded with, to be dripping with, to be full of, to be suffused with, to bear in mind, to cherish, to comprise, to contain, to embrace, to harbor, to have, to hold, to hold in the mouth, to include), のみこむ (to catch on to, to digest, to gulp down, to learn, to swallow deeply, to take in), つうじあう (to communicate with), つうじる (to be well informed, to communicate, to lead to, to run to), かみわける (to distinguish, to taste), わきまえる (to bear in mind, to discern, to discriminate, to know), わかる (to be understood, to know), みとる (to care for the sick, to perceive). (various references)

Maori

maatau-ria (ki). (various references)

Maya

na'at. (various references)

Pidgin English

understand, hear (heard). (various references)

Pig Latin

otay erstandunday.(various references)

Portuguese

entender (know, perceive, read, realize, savvy, sense, spell out, understand), compreender (realize). (various references)

Portuguese Brazilian

interpretar, entender. (various references)

Romansch

chapir. (various references)

Romany

ahàyava. (various references)

Sicilian

capiri. (various references)

Spanish

comprender (understand, realize). (various references)

Swazi

kú-va. (various references)

Swedish

antyda (imply, insinuate, suggest). (various references)

Tahitian

ta'a. (various references)

Turkish

ima etmek (adumbrate, allude to, give smb. to understand, hint at, imply, import, insinuate, intimate, mention, refer, shadow forth, shadow out, sign, suggest), anlayamamak (elude, make nothing of, miss the point, not to understand), çıtlatmak (drop a hint, give a hint, give smb. to understand, hint, indicate, insinuate, intimate, spring). (various references)

Ukrainian

дати зрозуміти (give to understand). (various references)