Definition of race-walk in US English:

race-walk

verb

[no object]
  • Engage in the sport or activity of race walking.

    ‘I use my lunch break to race-walk’
    ‘the youngest person to race-walk 100 miles in less than 24 hours’

Pronunciation

race-walk

/ˈreɪsˌwɔk//ˈrāsˌwôk/