sub-

From Latin sub (“under”).

sub-

1. under, beneath

   subterranean

   submarine

2. subsidiary, secondary

   subplot

3. almost, nearly

   subhuman

   suborbicular

In Latin, the following sound changes affected "sub-" and cause English borrowings from Latin which contain this prefix to have different forms. Words formed in English using the prefix "sub-" do not exhibit these sound changes. (Combination with 's' involved elision and the other changes involved assimilation.)

• sub + c = suc- (hence succession, from Latin successiō; but e.g. subculture formed in English from sub- + culture)
• sub + c = sus- (susceptible)
• sub + f = suf- (suffer, but subfield)
• sub + g = sug- (suggestion, but subgroup)
• sub + p = sup- (support, but subpage)
• sub + r = sur- (surrogate, but subroutine)
• sub + s = su- (suspect, but subset)
• sub + sp = su- (suspire, but subspecies)
• sub + c, p or t = sus- (susceptible, suspend, sustain, but subtitle)[1]

• super-

• Bus., SBU, UBS, USB, bus, bus.

• Audio

  (file)

sub-

1. sub-

From Latin sub-

• IPA^(key): /syb/, /syp/

sub-

1. sub-

From Latin sub-

• sud- (before a letter "d")
• sum- (before a letter "m")

sub-

1. sub- (clarification of this definition is needed)

From sub (“under, beneath, below”)

• suc- (before c)
• suf- (before f)
• sug- (before g)
• sup- (before p)
• sur- (before r)
• su- (before sp)

sub-

1. sub-

From Latin sub-

sub-

1. sub- (under, beneath)

   Synonym: so-

2. sub- (subsidiary, secondary)

See sub, from Latin sub.

• IPA^(key): /sub/

sub-

1. sub-

From Latin sub-

sub-

1. sub-

   Synonym: so-