Pronunciation guide: IPA symbols, stress and word endings

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.

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)

-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.

marshmallow

UK /mɑːʃˈmæləʊ/ · US /ˈmɑɹʃˌmɛl.oʊ/ noun, verb

Forms marshmallows marshmallowing marshmallowed marsh mallow marsh-mallow

noun Marsh mallow, a species of mallow, Althaea officinalis, that grows in marshy terrain.
noun (countable, uncountable) A type of confectionery, originally (since Ancient Egyptian times) made from this plant, but now generally made of sugar or corn syrup, gelatin that has been presoftened in water, gum arabic, flavorings, and sometimes beaten egg whites, all whipped to a spongy consistency.
noun (figuratively) Someone who is soft and benign. “He acts like a total badass, but he's really just a marshmallow once you get to know him.”
verb (transitive, intransitive) To soften (literally or figuratively).

Etymology

From Old English mersċmealwe, corresponding to marsh + mallow.

Sources: Wiktionary — from the Wiktionary entry “marshmallow”, CC BY-SA 4.0. Details