perilous gauge vial arsenal dilapidated

perilous

per·il·ous /ˈperələs, ˈperɪləs/ adjective literary or formal

very dangerous

• a perilous journey across the mountains

gauge

gauge1 (also gage American English) /ɡeɪdʒ/ noun [countable]

1. an instrument for measuring the size or amount of something
   1. fuel/temperature/pressure etc gauge
      1. The petrol gauge is still on full
2. a measurement of the width or thickness of something such as wire or metal
   1. a 27-gauge needle
   2. heavy gauge black polythene
3. a gauge of something something that helps you make a judgment about a person or situation
   1. Retail sales are a gauge of consumer spending
   2. The tests will give parents a gauge of how their children are doing.
4. the distance between the lines of a railway or between the wheel of a train
   1. a standard gauge railway
   2. broad/narrow gauge (=with more/less than the standard distance between the rails)
5. the width of the barrel of a gun
   1. a 12-gauge shotgun

vial

vi·al /ˈvaɪəl/ (also phial British English) noun [countable] formal

a very small bottle used for medicine, perfume etc

arsenal

ar·se·nal /ˈɑːsənəl $ ˈɑːr-/ noun [countable]

1. a large group of weapons that someone has
   1. Britain's nuclear arsenal
   2. arsenal of
      1. an arsenal of guns
2. a building where weapons are stored
3. the equipment, methods etc that someone can use to help them achieve something
   1. a software package that's now part of our arsenal
   2. arsenal of
      1. He has a whole arsenal of cameras.

dilapidated

di·lap·i·dat·ed /dəˈlæpədeɪtəd, dɪˈlæpədeɪtəd/ adjective

a dilapidated building, vehicle etc is old and in very bad condition

• dilapidation /dəˌlæpəˈdeɪʃən, dɪˌlæpəˈdeɪʃən/ noun [uncountable]

Reference

• Longman Dictionary of Contemporary English