fuel(n = noun.substance) - a substance that can be consumed to produce energy; "more fuel is needed during the winter months"; "they developed alternative fuels for aircraft"
is a kind of substance
has particulars: biomass, butane, charcoal, wood coal, coal gas, coke, diesel fuel, diesel oil, fire, fossil fuel, fuel oil, heating oil, gasohol, gas, gasolene, gasoline, petrol, illuminant, coal oil, kerosene, kerosine, lamp oil, methanol, methyl alcohol, wood alcohol, wood spirit, nuclear fuel, propane, red fire, combustible, combustible material, water gas, firewood, igniter, ignitor, lighter
Derived forms verb fuel₃, verb fuel₁, verb fuel₂

1.  fuel(v = verb.possession) - provide with a combustible substance that provides energy; "fuel aircraft, ships, and cars"
is one way to furnish, provide, render, supply
Derived forms noun fuel₁, noun fueling₁
Sample sentences: Somebody ----s something

2.  fuel(v = verb.possession) fire - provide with fuel; "Oil fires the furnace"
is one way to furnish, provide, render, supply
Derived form noun fuel₁
Sample sentences: Something ----s something

3.  fuel(v = verb.possession) - take in fuel, as of a ship; "The tanker fueled in Bahrain"
is one way to take in, take up
Derived forms noun fuel₁, noun fueling₁
Sample sentences: Something ----s; Something is ----ing PP

4.  fuel(v = verb.emotion) - stimulate; "fuel the debate on creationism"
is one way to excite, shake, shake up, stimulate, stir
Sample sentences: Something ----s somebody

1.  Any matter used to produce heat by burning; that which feeds fire; combustible matter used for fires, as wood, coal, peat, etc. [1913 Webster]

2.  Anything that serves to feed or increase passion or excitement. [1913 Webster]

1.  To feed with fuel. [1913 Webster]
"Never, alas I the dreadful name,
That fuels the infernal flame." [1913 Webster]

2.  To store or furnish with fuel or firing. [1913 Webster]
"Well watered and well fueled." [1913 Webster]

fuel, n. & v.
--n.
1 material, esp. coal, wood, oil, etc., burnt or used as a source of heat or power.
2 food as a source of energy.
3 material used as a source of nuclear energy.
4 anything that sustains or inflames emotion or passion.
--v. (fuelled, fuelling; US fueled, fueling)
1 tr. supply with fuel.
2 tr. sustain or inflame (an argument, feeling, etc.) (drink fuelled his anger).
3 intr. take in or get fuel.

Idiom:
fuel cell a cell producing an electric current direct from a chemical reaction. fuel element an element of nuclear fuel etc. for use in a reactor. fuel injection the direct introduction of fuel under pressure into the combustion units of an internal-combustion engine. fuel oil oil used as fuel in an engine or furnace.

Etymology:
ME f. AF fuaille, fewaile, OF fouaille, ult. f. L focus hearth

N  materials, material, raw material, stuff, stock, staple, adobe, brown stone, chinking, clapboard, daubing, puncheon, shake, shingle, bricks and mortar, metal, stone, clay, brick crockery, compo, composition, concrete, reinforced concrete, cement, wood, ore, timber, materials, supplies, munition, fuel, grist, household stuff pabulum, ammunition, contingents, relay, reinforcement, reenforcement, baggage, means, calico, cambric, cashmere, raw, wooden, adobe.

N  fuel, firing, combustible, coal, wallsend, anthracite, culm, coke, carbon, charcoal, bituminous coal, tar shale, turf, peat, firewood, bobbing, faggot, log, cinder, ingle, tinder, touchwood, sulphur, brimstone, incense, port-fire, fire-barrel, fireball, brand, amadou, bavin, blind coal, glance coal, German tinder, pyrotechnic sponge, punk, smudge, solid fueled rocket, wax, paraffin wax, paraffin oil, lamp oil, whale oil, oil, petroleum, gasoline, high octane gasoline, nitromethane, petrol, gas, juice, gasohol, alcohol, ethanol, methanol, fuel oil, kerosene, jet fuel, heating oil, number 2 oil, number 4 oil, naphtha, rocket fuel, high specific impulse fuel, liquid hydrogen, liquid oxygen, lox, natural gas, synthetic gas, synthesis gas, propane, butane, hydrogen, brand, torch, fuse, wick, spill, match, light, lucifer, congreve, vesuvian, vesta, fusee, locofoco, linstock, candle, oil, carbonaceous, combustible, inflammable, high octane, high specific impulse, heat of combustion.

diesel fuel, fossil fuel, fuel cell, fuel consumption rate, fuel filter, fuel gauge, fuel indicator, fuel injection, fuel injection system, fuel level, fuel line, fuel oil, fuel pod, fuel system, nuclear fuel, rocket fuel