Word Unit: aracho-, arachi-, arachid-, araki- (Greek > Latin: legume; peanut)
Word Unit: arano-, aran- + (Latin: spider)

Cross references of word families that are related directly, or indirectly, to: "spider; arachnoidea": acaro-; arachno-; mite, mites.

Word Unit: arbitr-, arbit- (Latin: consider, judge; spectator, listener, witness; originally, "decided by one's own discretion or judgment")
Word Unit: arbor-, arbori- (Latin: tree, trees)
Word Unit: arbuscu-, arbusc- (Latin: shrub)
Word Unit: arc, arc-, arci-, arch, arch- (Latin: arcus, bow, a curved structure)
Word Unit: arch-, archi-, -arch (Greek > Latin: chief, principal leader, first [in position or rank])

Cross references of word families related directly, or indirectly, to: "master, lead, leading, ruler, ruling, govern": -agogic; agon-; -crat; dom-; gov-; magist-; poten-; regi-; tyran-.

Word Unit: arch, -archic, -archical, -archism, -archist, -archy (Greek: govern, rule; ruler, chief [first in position])
Word Unit: archaeo-, archeo-, archae-, arche-, archa-, archi-, -arch (Greek: original [first in time], beginning, first cause, origin, ancient, primitive, from the beginning; most basic)

Related "time" units: aevum, evum; Calendars; chrono-; horo-; pre-; Quotes: Time; tempo-.

Word Unit: arcto-, arct- + (Greek: of the bear, bear [the animal]; or the north, northern)

Related "bear, bears (animals)" word units: Berserk; ursi-.

Word Unit: -ard, -art (a suffix which forms nouns that refer to people who regularly engage in some activity, or who are characterized in a certain way, as indicated by the stem or root of the word; originally, which appeared in Middle English in words from Old French where it expressed an intensive degree or with a pejorative or disparaging application)
Word Unit: arena, areni- (Latin: harena; sand, sandy place, sea-shore; place of combat [literally, "place strewn with sand"])

Other related "sand" units: amatho-; ammo-; silico-; thino-.

Word Unit: Arena: Blood, Sweat, and Cheers; Part 1 of 2 (Latin: harena, "sand" or "arena" in English, became the general term for "shows" and now it refers more to "sports", etc.)
Word Unit: Arena: Blood, Sweat, and Cheers; Part 2 of 2 (Latin: harena, "sand" or "arena" in English, became the general term for "shows" and now it refers more to "sports", etc.)
Word Unit: areo- (Greek: thin, slight, weak; small space)
Word Unit: areo-, are- + (Greek: of, or pertaining to "god of war", Ares or Mars, used primarily in astronomy)

Related "war, war-like" or "battle" word units: belli-; -machy; milit-.

Word Unit: argento-, argent-, argenti- (Latin: silver, silvery, silverish)
Word Unit: argill-, argillo- + (Greek > Latin: clay)

Cross references of word families related directly, or indirectly, to: "land, ground, fields, soil, dirt, mud, clay, earth (world)": agra-; agrest-; agri-; agro-; choro-; chthon-; epeiro-; geo-; glob-; lut-; myso-; pedo-; pel-; rhyp-; soil-; sord-; terr-.

Word Unit: argo- + (Greek > Latin: passive, unworkable, slow; a-, "without, not" + ergon, "work")

Cross references related to "work, toil" word families: ergasio-; ergo-; labor-; oper-; pono-; urg-.

Word Unit: argyro-, argyr- (Greek: silver)