The correct spelling for the phrase "gives shot arm" would be "gives shot in the arm." The sound represented by the ending "-es" in "gives" is pronounced as /ɪz/ in the IPA phonetic transcription. The word "shot" is pronounced as /ʃɑt/ which represents the "sh" sound followed by the short "o" sound. Lastly, the phrase "in the arm" is pronounced as /ɪn ði ɑrm/ which represents the short "i" sound followed by the "n" sound, the voiced "th" sound, the short "a" sound, the "r" sound, and the "m" sound.