ɐ tɹˈʌŋkeɪɾᵻd spˈɜːɹ ɪz ɐ spˈɜː, wˌɪtʃ ɪz ɐ ɹˈɪdʒ ðæt dᵻsˈɛndz təwˈɔːɹdz ɐ vˈæli flˈoːɹ ɔːɹ kˈoʊstlaɪn fɹʌm ɐ hˈaɪɚɹ ˌɛlɪvˈeɪʃən, ðæt ˈɛndz ɪn ɐn ɪnvˈɜːɾᵻdvˈiː fˈeɪs ænd wʌz pɹədˈuːst baɪ ðɪ ɪɹˈoʊʒənəl tɹʌŋkˈeɪʃən ʌvðə spˈɜː baɪ ðɪ ˈækʃən ʌv ˈiːðɚ stɹˈiːmz, wˈeɪvz, ɔːɹ ɡlˈeɪʃɚz.
A truncated spur is a spur, which is a ridge that descends towards a valley floor or coastline from a higher elevation, that ends in an inverted-V face and was produced by the erosional truncation of the spur by the action of either streams, waves, or glaciers.