Pronunciation guide: IPA symbols, stress and word endings

Vowels

iː	see	ɪ	sit	e / ɛ	bed	æ	cat
ɑː	father	ɒ	hot (UK)	ɔː	law	ʊ	put
uː	too	ʌ	cup	ɜː	bird	ə	about
eɪ	day	aɪ	my	ɔɪ	boy	aʊ	now
əʊ / oʊ	go (UK / US)	ɪə	near	eə	hair	ʊə	tour

Consonants that look unusual

θ	thin	ð	this	ʃ	she	ʒ	measure
tʃ	church	dʒ	judge	ŋ	sing	j	yes

p b t d k g f v s z h m n l r w sound as in ordinary English spelling.

Marks

ˈ main stress, before the stressed syllable: /ˈwɔːtə/ water · ˌ lighter (secondary) stress: /ˌʌndəˈstænd/ understand
ː a long vowel · (r) an r said only in accents that pronounce it (most American, Scottish, Irish)

Common word endings

-s / -es (plurals; he/she form of verbs): /s/ after voiceless sounds (cats), /z/ after voiced (dogs), /ɪz/ after s, z, sh, ch, j sounds (buses, watches). Spelling: -es after s, x, z, ch, sh; consonant + y → -ies (city → cities).
-ed (past): /t/ after voiceless sounds (walked), /d/ after voiced (played), /ɪd/ after t or d (wanted). Spelling: love → loved, stop → stopped, carry → carried.
-ing: make → making, run → running, see → seeing.
Irregular: go, went, gone · be, was, been · see, saw, seen · man → men · child → children · mouse → mice.
Older (King James) forms: -eth = -s (he loveth = he loves) · -est with “thou” (thou lovest) · spake = spoke.

English Dictionary · 107,383 entries · Sources & licences

molybdenum

/məˈlɪbdɪnəm/ noun

Forms molybdenums molybdænum

noun A chemical element (symbol Mo) with an atomic number of 42: a silvery metal, not found as a free element, used in steel alloys.
noun A single atom of this element. “a quadruple bond between molybdenums”

Synonyms

Mo atomic number 42

Etymology

From New Latin molybdaenum, from molybdaena (“any of various substances resembling lead”), from Ancient Greek μολύβδαινα (molúbdaina, “a plummet, piece of lead”), from μόλυβδος (mólubdos, “lead; graphite”), from an Anatolian word cognate with Lydian 𐤪𐤠𐤭𐤦𐤥𐤣𐤠 (mariwda, “dark”), from Proto-Indo-European *morkʷ-iyo-, from a root *morkʷ- (“dark”), cognate with English murk. Cf. Latin plumbum nigrum 'lead'. The suffix is + -um (“a chemical element”).
Attested since the last quarter of 18th century.

Webster’s 1913

noun A rare element of the chromium group, occurring in nature in the minerals molybdenite and wulfenite, and when reduced obtained as a hard, silver-white, difficulty fusible metal. Symbol Mo. Atomic weight 95.9.

Etymology [NL.: cf. F. molybdène. See Molybdena.]

Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “molybdenum”, CC BY-SA 4.0. Details