Hukum bunyi bahasa Indo-Eropa
Konsonan

Tabel berikut menjnjukan konsonan Proto-Indo-Eropa dan refleks dalam bahasa saudari Indo-Eropa yang terpilih. Latar belakang dan detail lanjutan lainnya dapat dilihat pada artikel terkait, seperri Fonologi bahasa Proto-Indo-Eropa, bahasa Centum dan Satem, artikel yang memiliki keterkaitan aturan suara diatas, dan artikel tentang topik proto-bahasa IE, kelompok bahasa, dan fonologinya. 
Untuk perkembangan dari teori laringeal dan konsonan silabik (suku-kata), lihat tabel vokal dibawah ini.
| PIE> PIE.PIE | Indo-Iran> Sns..Sns. | Indo-Iran> Av..Av. | Balto-Slavia> S.G.K..S.G.K. | Balto-Slavia> Lith..Lith. | Alb> .Alb..Alb. | Arm> .Arm..Arm. | Anatol> .Hitt..Hitt. | Toch> .Toch..Toch. | Yunani> Yunani.normal | Yunani> Yunani.C+[j] | Italik> Latin.Latin | Seltik> Irlandia kuno.normal | Seltik> Irlandia kuno.-C-  | Jermanik> Gotik.Gotik | Jermanik> Inggris.Inggris |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| *p | p; ph [pʰ]  | p; f  | p | p | p | h; w  | p, pp | p | p | pt | p | ∅ | ∅ | f; b [β]  | f; v, f |
| *t | t; th [t̪ʰ]  | t; θ | t | t | t | tʿ [tʰ] | t, tt; z [ts]  | t; c [c]  | t | s; tt/ss | t | t | th [θ] | þ [θ]; d [ð]; | th; d; |
| *ḱ | ś [ɕ] | s | s | š [ʃ] | th [θ]; k | s | k, kk | k; ś [ɕ] | k | s; tt/ss | c [k] | c [k] | ch [x] | h; g [ɣ]  | h; ∅; y   |
| *k | k; c [t͡ɕ]; kh [kʰ]  | k; c [tʃ]; x | k; č [tʃ]; c [ts] | k | k | kʿ [kʰ] | k, kk | k; ś [ɕ] | k | s; tt/ss | c [k] | c [k] | ch [x] | h; g [ɣ]  | h; ∅; y   |
| *kʷ | k; c [t͡ɕ]; kh [kʰ]  | k; c [tʃ]; x | k; č [tʃ]; c [ts] | k | k; s; q [c] | kʿ [kʰ] | ku, kku | k; ś [ɕ] | p; t; k | s; tt/ss | qu [kʷ]; c [k]  | c [k] | ch [x] | ƕ [ʍ]; gw, w   | wh; w  |
| *b | b; bh  | b; β  | b | b | b | p | p | p | b | pt | b | b [b] | -[β]- | p | p |
| *d | d; dh  | d; δ  | d | d | d; dh [ð] | t | t | ts; ś [ɕ]  | d | z [zd] > [z] | d | d [d] | -[ð]- | t | t |
| *ǵ | j [d͡ʑ]; h [ɦ]  | z | z | ž [ʒ] | dh [ð]; g | c [ts] | k | k; ś [ɕ] | g | z [zd] > [z] | g | g [ɡ] | -[ɣ]- | k | c / k; ch |
| *g | g; j [d͡ʑ]; gh; h [ɦ]  | g; j [dʒ]; γ  | g; ž [ʒ]; dz | g | g | k | k | k; ś [ɕ] | g | z [zd] > [z] | g | g [ɡ] | -[ɣ]- | k | c / k; ch |
| *gʷ | g; j [d͡ʑ]; gh; h [ɦ]  | g; j [dʒ]; γ  | g; ž [ʒ]; dz | g | g; z; gj [ɟ] | k | ku | k; ś [ɕ] | b; d; g | z [zd] > [z] | u [w > v]; gu [ɡʷ]  | b [b] | -[β]- | q [kʷ] | qu |
| *bʰ | bh [bʱ] | b; β  | b | b | b | b; w | p | p | ph [pʰ] | pt | f; b | b [b] | -[β]- | b [b]; b [β]; f  | b; v / f |
| *dʰ | dh [dʱ] | d; δ  | d | d | d | d | t | t; c [c]  | th [tʰ] | tt/ss | f; d; b  | d [d] | -[ð]- | d; d [ð]; þ  | d |
| *ǵʰ | h [ɦ] | z | z | ž [ʒ] | dh [ð]; d | j [dz]; z | k | k; ś [ɕ]  | kh [kʰ] | tt/ss | h; h / g | g [ɡ] | -[ɣ]- | g; g [ɣ]; g [x]  | g; y / w |
| *gʰ | gh [ɡʱ]; h [ɦ]  | g; j [dʒ]; γ  | g; ž [ʒ]; dz | g | g | g; ǰ [dʒ]  | k | k; ś [ɕ]  | kh [kʰ] | tt/ss | h; h / g | g [ɡ] | -[ɣ]- | g; g [ɣ]; g [x]  | g; y / w |
| *gʷʰ | gh [ɡʱ]; h [ɦ]  | g; j [dʒ]; γ  | g; ž [ʒ]; dz | g | g; z; gj [ɟ] | g; ǰ [dʒ]  | ku | k; ś [ɕ]  | ph [pʰ]; th [tʰ]; kh [kʰ] | tt/ss | f; g / u [w]; gu [ɡʷ]  | g [ɡ] | -[ɣ]- | g; b; w; gw  | g; b; w |
| *s | s | h [h, x] | s | s | sh [ʃ]; gj [ɟ]; h | h; ∅ | š [s] | s; ṣ [ʂ] | h; s;/ ∅; [¯]  | i | s; r | s ʃ | -[h]- | s; z  | s; r  |
| *s | ṣ [ʂ] | š [ʃ] | x [x] | š [ʃ] | sh [ʃ]; gj [ɟ]; h | h; ∅ | š [s] | s; ṣ [ʂ] | h; s;/ ∅; [¯]  | i | s; r | s ʃ | -[h]- | s; z  | s; r  |
| *m | m | m | m | m | m | m | m | m | m | in | m | m [m] | -[w̃]- | m | m |
| *-m  | m | m | ˛ [˜] | n | n | ∅ | n | n | n | -- | m [˜] | n | n | ∅ | ∅ |
| *n | n | n | n; ˛ [˜]  | n | n | n | n | n; ñ [ɲ] | n | in | n | n | n | n | n |
| *l | r (dial. l) | r | l | l | l; ll [ɫ] | l / ɫ [ɫ  > ɣ] | l | l | l | il | l | l | l | l | l |
| *r | r | r | r | r | r [ɾ]; rr [r] | r | r | r | r | ir | r | r | r | r | r |
| *y | y [j] | y [j] | j [j] | j [j] | gj [ɟ]; ∅ | ∅ | y [j] | y [j] | z [zd] > [z] / h; ∅  | ?i | i [j]; ∅  | ∅ | ∅ | j | y |
| *w | v [ʋ] | v [w] | v | v [ʋ] | v | g / w | w | w | w > h / ∅ | i | u [w > v] | f | -∅- | w | w |
| PIE | Sns. | Av. | S.G.K. | Lith. | Alb. | Arm. | Hitt. | Toch. | Yunani | Yunani+/j/ | Latin | Irlandia Kuno | Irlandia Kuno | Gotik | Inggris |
Catatan tabel 1:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20  Antara vokal
1 2 3 4 5 6 7 8  Sebelum h₂ original.
1 2 3  Sebelum konsonan ataupun laringeal awal.
1 2  Setelah vokal.
1 2 3 4 5 6 7 8 9  Mengikuti vokal tak tertekan (Aturan Vener).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21  Sebelum vokal depan (PIE) (*i, *e).
1 2 3 4 5 6  Sebelum sonoran.
1 2 3 4 5 6 7  Sebelum Vokal depan kedua (paska-PIE).
1 2 3  Sebelum atau setelah (PIE) u
↑  Sebelum atau sesudah vokal bulat (PIE) (*u, *o).
1 2 3 4 5 6  dalam Avestan muda yang diletakkan setelah vokal.
1 2 3  After n.
1 2 3 4 5 6  Awal kata
1 2 3 4 5 6  Akhir sebuah kata.
1 2  Antara vokal, atau setelah vokal dan konsonan and r, l (ataupun di sisi)
↑  After u, r or before r, l.
↑  Sebelum vokal tertekan
↑  Sebelum konsonan obstruen (p, t, k, dsb.; s)
↑  Sebelim dan setelah konsonan resonan (r, l, m, n).
1 2 3 4  Setelah r, u, k, i (aturan suara Ruki ).