Graphemes for Back + Front Diphthongs

Falling

/ou/ - close-mid back rounded + close back rounded diphthong

Writing System	Grapheme	Example	Notes
ast-Latn	<ou>	mou ‘manner’
en-Latn	<ew>	sew
en-Latn	<oa>	boat
en-Latn	<oe>	toe
en-Latn	<ough>	though, thorough
en-Latn	<ow>	row
en-Latn	<o>	open
es-Latn	<ou>	bou ‘trawler’	/ou/ is a rare diphthong in Spanish
ne-Deva	<ओऊ>	धोऊ ‘wash’	/ou/ can be represented by ‹ओऊ›, ‹ओˌू›, ‹ˌोˌू›, or ‹ˌोऊ›.

/ʌu/ - open-mid back unrounded + close back rounded diphthong

Writing System	Grapheme	Example	Notes
ne-Deva	<औ>	औधी ‘exceedingly’
ne-Deva	<◌ौ>	पौने ‘three-quarters’

/ɔu/ - open-mid back rounded + close back rounded diphthong

Writing System	Grapheme	Example	Notes
wo-Arab	<◌ࣷو>	سࣷو ‘(sun) to set’
wo-Latn	<ow>	sow ‘(sun) to set’

/ɔːu/ - lengthened open-mid back rounded + close back rounded diphthong

Writing System	Grapheme	Example	Notes
wo-Arab	<◌ࣷوو>	سࣷووْ ‘to make noise, raw milk’
wo-Latn	<oow>	soow ‘to make noise, raw milk’

/au/ - open near-front unrounded + close back rounded diphthong

Writing System	Grapheme	Example	Notes
ast-Latn	<au>	prau ‘meadow’
de-Latn	<au>	Hause ‘house’
dv-Thaa	<◌ައ◌ު>	މައުލުމާތު
en-Latn	<ough>	bough
en-Latn	<ou>	round
en-Latn	<ow>	how
es-Latn	<au>	causa ‘cause’
id-Latn	<au>	mau ‘want’, atau ‘or’, kalau ‘if’
ne-Deva	<आउ>	आउनु ‘to come	/au/ can be represented by ‹आउ›, ‹आु›, ‹ˌाˌु›, or ‹ˌाउ›.
png-Latn	<au>	wau, ambyau
wo-Arab	<◌َو>	دَوْ ‘to run’
wo-Latn	<aw>	daw ‘to run’

/aːu/ - lengthened open near-front unrounded + close back rounded diphthong

Writing System	Grapheme	Example	Notes
wo-Arab	<◌َاو>	بَاوَانْ ‘to flow like water’
wo-Latn	<aaw>	baawaan ‘to flow like water’

Rising

/wo/ - close back rounded + close-mid back rounded rising diphthong

Writing System	Grapheme	Example	Notes
ast-Latn	<uo>	naguo ‘I want’
es-Latn	<uo>	cuota ‘quota’, ingenuo ‘naïve’

/wɑ/ - close back rounded + open back unrounded rising diphthong

None