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.

folder

UK /ˈfəʊldə/ · US /ˈfoʊldɚ/ noun

Forms folders

noun An organizer that papers are kept in, usually with an index tab, to be stored as a single unit in a filing cabinet. “I keep all my schoolwork in a yellow folder.”
noun (computing) A virtual container in a computer's file system, in which files and other folders may be stored. The files and subfolders in a folder are usually related. “My essays are in the folder named "Schoolwork".”
noun A machine or person that folds things.
noun A folding knife, typically a folding pocketknife.

Synonyms

From fold + -er.

noun One who, or that which, folds; esp., a flat, knifelike instrument used for folding paper.

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