ought¹ /öt/

1. Pat of owe
2. Now obsolete or dialect except as an auxiliary verb, taking an infinitive with to, and usu with time expressed by the tense of the infinitive, expressing duty or obligation, rightness or suitability, or probability

• radio frequencies
• radio frequency
• radio-frequency heating
• radio galaxies
• radio galaxy
• radiogenic
• radiogoniometer
• radiogoniometers
• radiogram
• radio-gramophone
• radio-gramophones
• radiograms
• radiograph
• radiographer
• radiographers
• radiographic
• radiographically
• radiographies
• radiographs
• radiography
• radio ham
• radio hams
• radioimmunoassay
• radioing
• radio interferometer