position. In non-initial positions, the single-letter voiceless stops c, p, and t become the voiced stops , , and respectively unless they are written double. Ambiguity in these letters' pronunciations arises when a single consonant follows an l, n, or r. The lenited stops ch, ph, and th become , , and respectively. {| class="wikitable" |- !colspan=3|Non-initial voiceless stops , , |- !Old Irish !Pronunciation !English |- | | | |- | or | | |- | or | | |- | | | |- | or | | |- !colspan=3|Lenited consonants , , |- | | | |- | | | |- | | | |} The voiced stops b, d, and g become fricative , , and , respectively—identical sounds to their word-initial lenitions. {| class="wikitable" |- !colspan=3|Non-initial voiced stops , , |- !Old Irish !Pronunciation !English |- | | | |- | | | |- | | | |- | | | |- | | | |} In non-initial positions, the letter m usually becomes the nasal fricative , but in some cases it becomes a nasal stop, denoted as . In cases in which it becomes a stop, m is often written double to avoid ambiguity. {| class="wikitable" |- !colspan=3|Non-initial consonant |- !Old Irish !Pronunciation !English |- | | | |- | or | | |} Stops following other consonants Ambiguity arises in the pronunciation of the stop consonants (c, g, t, d, p, b) when they follow l, n, or r: {| class="wikitable" |- !colspan=3|Homographs involving , , |- !Old Irish !Pronunciation !English |- | | | |- | | | |- | | | |- | | | |- | | | |- | | | |} After m, the letter b is naturally a stop . After d, l, r, the letter b is fricative : {| class="wikitable" |- !colspan=3|Consonant |- !Old Irish !Pronunciation !English |- | | | |- | | | (in a tree) |- | | | |- | | | |} After n or r, the letter d is a stop : {| class="wikitable" |- !colspan=3|Consonant |- !Old Irish !Pronunciation !English |- | | | |- | | | |} After n, l, or r, the letter g is usually a stop , but it becomes a fricative in a few words: {| class="wikitable" |- !colspan=3|Consonant |- !Old Irish !Pronunciation !English |- | | | |- | or |