8 Old HSK word(s):

☊封 ** A

☊信 ** A

☊来信 ** B

☊字母 ** C

☊信息 ** C

☊通信 ** C

☊书信 ** D

☊信件 ** D

信 trust, believe / letter

件 numerary adjunct for article / matter

Phonetic KEY:
函 Letter hán

Hsk Characters:

HSK -Characters and beyond:

Gb	Big5	Eng	Rad	Mega	Triple	Multilingual
封 5C01 +	封 + +	letter, envelope / feudal	寸	封	Inch 封 (BRIEF) feng1	+
柬 67EC +	柬 + +	letter, invitation / choose	木	柬	Tree 柬 (KARTE_BRIEF) jian3	+
札 672D +	札 + +	letter, note / correspondence	木	扎	Tree 扎 zha2	+
字 5B57 +	字 + +	letter, character, word	子	子	Child 子 (KIND) zi4	+

Korean:

12 NHSK word(s): 书 * 1 shu1book/ letter/ CL:本[ben3];冊|册[ce4];部[bu4]/ see also 書經|书经 Book of History 字 * 1 zi4letter/ symbol/ character/ word/ CL:個|个[ge4]/ courtesy or style name traditionally given to males aged 20 in dynastic China 信 * 3 xin4letter/ mail/ to trust/ to believe/ to profess faith in/ truthful/ confidence/ trust/ at will/ at random 亲爱 * 5 qin1 ai4Dear or beloved (way of starting a letter) 挂号 * 5 gua4 hao4to register (a letter etc) 派 * 5 pai4clique/ school/ group/ faction/ to dispatch/ to send/ to assign/ to appoint/ pi (Greek letter Ππ)/ the circular ratio pi = 3.1415926 乙 * 5 yi3second of 10 heavenly stems 十天干/ second in order/ letter "B" or roman "II" in list "A; B; C"; or "I; II; III" etc/ second party (in legal contract; usually 乙方|乙方[yi3 fang1]; as opposed to 甲方|甲方[jia3 fang1])/ ethyl/ bent/ winding/ radical in Chinese charac 套 * 5 tao4cover/ sheath/ to encase/ a case/ to overlap/ to interleave/ bend (of a river or mountain range; in place names)/ harness/ classifier for sets; collections/ tau (Greek letter Ττ) 丙 * 5 bing3third of 10 heavenly stems 十天干/ third in order/ letter "C" or roman "III" in list "A; B; C"; or "I; II; III" etc/ propyl 赤字 * 6 chi4 zi4(financial) deficit/ red letter 启事 * 6 qi3 shi4announcement (written; on billboard; letter; newspaper or website)/ to post information/ a notice 字母 * 6 zi4 mu3letter (of the alphabet)/ CL:個|个[ge4]

5 KOREAN6000 word(s):
A 편지 [pyeonji] Letter

B 글자 [geulja] A letter or a character

C 문자 [munja] letters,character

B 글씨 [geulssi] 1) Handwriting 2) a letter or an ideograph or a character

B 통 [tong] Counters for letters

KOREAN 2500 New HSK words):

KOREAN Sentence(s):