The Word is:”go”
“he went out to the shops”
synonyms: move, proceed, make one’s way, advance, progress, pass, walk, wend one’s way; More
“I really must go”
synonyms: leave, depart, take one’s leave, take oneself off, go away, go off, withdraw, absent oneself, say one’s goodbyes, quit, make an exit, exit; More
an attempt or trial at something.
“have a go at answering the questions yourself”
synonyms: attempt, try, effort, bid, endeavour; More
a person’s turn to use or do something.
“I had a go on Nigel’s racing bike”
“all systems go”
Source credit: Google