- (n) (1) (abbr) letter 'M'
 (2) Mega
 (3) (col) masochist
 masochistic
 
- (n) (1) (abbr) letter "S" (abbr. for sister, south, steam, etc.)
 (2) (abbr) sadistic
 sadist
 
- (int) (1) Ah! (expression of surprise, recollection, etc.)
 Oh!
 (2) Hey! (to get someone's attention)
 
- (prt) (fam) strengthens a question, assertion, etc. 
- (int) (1) eh? (surprise)
 (2) eh (agreement)
 (prt) (3) (arch) strengthens a question, assertion, etc.
 (4) (after a noun) used when calling out to someone
 
- (int) oh! (expression of slight surprise) 
- (prt) (1) indicates question (sentence end)
 (2) indicates choice, doubt, etc.
 (P)
 
- (prt) (1) indicates sentence subject (occasionally object)
 (2) indicates possessive (esp. in literary expressions)
 (prt,conj) (3) but
 however
 still
 and
 (P)
 
- (prt) particle indicating that the speaker is trying to recall some information 
- (int) exclamation of surprised disappointment, disgust, or worry (yuck, ick, ack, eeew, crap!, blech, gross) 
- (suf) (1) -ness (nominalizing suffix indicating degree or condition)
 (prt) (2) (sentence end, mainly masc.) indicates assertion
 (int) (3) come
 come now
 (P)
 
- (n) (obsc) 10^24 (kanji is JIS X 0212 kuten 4906)
 septillion (American)
 (obs) quadrillion (British)
 
- (prt,conj) (at the end of a phrase) notes one (of several) reasons
 (P)
 
- (prt) (sentence end, mainly masc.) adds force
 indicates command
 (P)
 
- (prt) (sentence end, mainly masc.) adds force
 indicates command
 (P)
 
- (aux) plain copula
 (P)
 
- (prt) (arch) indicates possessive (often found in place names and compound words) 
- (prt) casual quoting particle
 (P)
 
- (prt) (1) indicates location of action
 at
 in
 (2) indicates time of action
 (3) indicates means of action
 cause of effect
 by
 (conj) (4) and then
 so
 (P)
 
- (prt,conj) (1) if
 when
 (2) and
 (3) with
 (4) particle used for quoting (with speech, thoughts, etc.)
 (n) (5) (abbr) promoted pawn (shogi)
 (P)
 
- (pref) (1) (ksb:) precisely
 exactly
 plumb
 totally
 very
 (2) derogatory prefix used before nouns & adjectives
 
- (prt) (1) (sentence end, mainly masc.) indicates emotion or emphasis
 (2) (abbr) (used with masu stem verb) command
 (3) (used with dictionary form verb) prohibition
 (P)
 
- (prt) indicates such things as location of person or thing, location of short-term action, etc.
 (P)
 
- (aux-v,suf) (1) (after the -nai stem of a verb) not (verb-negating suffix)
 (2) (arch) indicates completion
 
- (prt) (1) (sentence end) indicates emphasis, agreement, request for confirmation, etc.
 is it so
 (int) (2) hey
 come on
 (P)
 
- (prt) indicates possessive among other uses (for full details and examples see the main entry (linked)) 
- (int) (1) yes
 indeed
 well
 (2) ha!
 (3) what?
 huh?
 (4) sigh
 
- (prt) (1) topic marker particle
 (2) indicates contrast with another option (stated or unstated)
 (3) adds emphasis
 (P)
 
- (prt) indicates supposition
 if ... then
 (P)
 
- (prt) indicates direction or goal (e.g. "to")
 (P)