Term: grate: a barrier that has parallel or crossed bars blocking a passage but admitting air
Broader: obstruction: any structure that makes progress difficult | Unrelated: modern ballet: a style of ballet that admits a wider variety of movements
Broader: obstruction: any structure that makes progress difficult | Unrelated: therm: a unit of heat equal to 100,000 British thermal units
Broader: obstruction: any structure that makes progress difficult | Unrelated: coiner: a skilled worker who coins or stamps money
Broader: obstruction: any structure that makes progress difficult | Unrelated: f: the 6th letter of the Roman alphabet
Broader: obstruction: any structure that makes progress difficult | Unrelated: odd-pinnate leaf: a pinnate leaf with a single leaflet at the apex
Broader: obstruction: any structure that makes progress difficult | Unrelated: hypsography: the scientific study of the earth's configuration above sea level (emphasizing the measurement of land altitudes relative to sea level)
Broader: obstruction: any structure that makes progress difficult | Unrelated: zero: a mathematical element that when added to another number yields the same number
Broader: obstruction: any structure that makes progress difficult | Unrelated: weak interaction: (physics) an interaction between elementary particles involving neutrinos or antineutrinos that is responsible for certain kinds of radioactive decay; mediated by intermediate vector bosons
Broader: obstruction: any structure that makes progress difficult | Unrelated: neap tide: a less than average tide occurring at the first and third quarters of the moon
Broader: obstruction: any structure that makes progress difficult | Unrelated: green: an area of closely cropped grass surrounding the hole on a golf course