en spend 花費 [Card #10; 字卡第10張: 第2個單字, 字母組合發音 en]
Some more examples（更多例字）：
short e sound:
spend, end, bend, lend, mend, send, tend, vend, fend, defend, lend, blend, trend, den, pen, ten, men, hen, Zen, yen, when, then, Ben, ken, glen, gender, gentle, mental, mention, pension, tension, tense, sense, dense, condense, consensus, central, center, render, tender, gender, engender, venture, adventure, engine, enzyme, envelope (envelop vs. envelope), enterprise, enter, entrance, entry, envy, entity, identity, density, plenty, frenzy, bench, quench, clench, stench, drench, wrench, trench, lens, length, strength, agenda, adventure, assemble, attention, addendum, appendix, append, impend, impending, intense, intensive, extensive, comprehensive, tentative, tendency, tendon, fence, sentence, sentiment, expense, dispense, suspense, surrender, slender, splendor, splendid, prevent, recommend, authentic, tremendous, potential, utensil, lentil, dentist
prefix en- /ɪn-/ (usually means “cause to")
enact, enhance, enchant, entangle, encamp, encapsulate, entrap, enrapture, endanger, engrain, enable, enslave, encase, encage, engage, enrage, enlarge, ensnare, envelop (envelop vs. envelope), enmesh, entrench, engender, enfeeble, endear, enrich, enlist, envision, envisage, encrypt, encipher, enwind, entwine, enshrine, entice, entitle, enliven, enlighten, encircle, encompass, engross, ennoble, encode, enthrone, enclothe, enclose, encroach, enforce, endorse, enroll, enfold, enjoy, enjoin, endow, encouch, encounter, encourage, engulf, entrust, endure, ensure
suffix -en /-ən/ ("to become" or "made of")
blacken, barren, brazen, fatten, flatten, fasten, hasten, madden, sadden, gladden, dampen, straighten, strengthen, darken, harden, sharpen, fallen, freshen, lessen, lengthen, cheapen, weaken, sweeten, deepen, bitten, hidden, forbidden, thicken, stiffen, glisten, quicken, stricken, ripen, widen, tighten, whiten, brighten, lighten, enlighten, forgotten, toughen, broken, frozen, chosen, woven, golden, soften, moisten, loosen, wooden, shorten