Adjective

(en adjective)

Manifesting, exercising, or favoring rigour; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration.

*{{quote-magazine, date=2013-08-03, volume=408, issue=8847, magazine=(The Economist)

, title= Boundary problems , passage=Economics is a messy discipline: too fluid to be a science, too rigorous to be an art. Perhaps it is fitting that economists’ most-used metric, gross domestic product (GDP), is a tangle too. GDP measures the total value of output in an economic territory. Its apparent simplicity explains why it is scrutinised down to tenths of a percentage point every month.}}

Severe; intense; inclement; as, a rigorous winter.

Violent.

Adjective

(er)

Resembling heath

* {{quote-book, year=1786, author=Boswell, title=Life Of Johnson, Volume 5, chapter=, edition= citation

, passage=The hills here, and indeed all the heathy grounds in general, abound with the sweet-smelling plant which the Highlanders call gaul , and (I think) with dwarf juniper in many places. }}

* {{quote-book, year=1884, author=A C and F T Gregory, title=Journals of Australian Explorations, chapter=, edition= citation

, passage=The country consists of elevated sandy downs covered with heathy bushes and a few small banksia trees, it being only on the alluvial flats of the river that there is any grass or good soil. }}

* {{quote-book, year=1894, author=John Muir, title=The Mountains of California, chapter=, edition= citation

, passage=Here make ground for a meadow; there, for a garden and grove, making it smooth and fine for small daisies and violets and beds of heathy bryanthus, spicing it well with crystals, garnet feldspar, and zircon." }}