far away from home or one's usual surroundings; "looking afield for new lands to conquer"- R.A.Hall
家や通常の環境から遠く離れた
afield
in or into a field (especially a field of battle); "the armies were afield, challenging the enemy's advance"; "unlawful to carry hunting rifles afield until the season opens"
領域で、あるいは領域の中へ(特に戦場)
afield
off the subject; beyond the point at issue; "such digressions can lead us too far afield"