accept=ac+cept acceptance=ac+cept+ance acceptable=ac+cept...[作者空间]

error=err+or erring=err+ing aberrant=ab+err+ant aberrance...[作者空间]

upgrade=up+grad+e downgrade=down+grad+e degrade=de+grad+e...[作者空间]

invade=in+vad+e invasion=in+vas+ion(vas=vad) invasive=in+...[作者空间]

pre - 向前，ante - 也代表向前re-往后，回retro-往后，回inter-中间，来回ex-pro-o...[作者空间]

ambulate=ambul+ate ambulation=ambul+ation ambulance=ambul...[作者空间]

progress=pro+gress progressive=pro+gress+ive progressist=...[作者空间]