thermometer
/θərˈmɒmɪtər/·서모미터·noun
a device for measuring temperature
GreekCEFR A2
Root
thermo- (heat) + Greek 'metron' (measure)
Greek thermos (hot) + metron (measure) → French thermomètre (17th c.) → English thermometer
In a word
thermo (heat) + meter (measure) = 'a heat-measurer'. The same thermo runs through thermal, thermos, thermodynamics. The same meter is the unit-mark in kilometer, diameter, parameter. Two Greek parts meet, and an everyday tool is named.
Examples
The thermometer reads 25 degrees.
Use a thermometer to check the fever.
The kitchen thermometer broke last week.
Related
thermalthermostatthermosthermodynamicsmeter