vouch
US
UK vouch for [sb] vi + prep: (give support)
SC 担保 dān bǎo
TC 擔保
TC 擔保
SC 保证 dān bǎo，bǎo zhèng
TC 保證 / 保証
TC 保證 / 保証
Harry vouched for Dan by lending him some money when he had a lot of debts.
vouch for [sth] vi + prep: (defend, corroborate)
SC 为…担保 wèi … dān bǎo
TC 為…擔保
TC 為…擔保
SC 为…证明
I can vouch for his honesty; I even trust him with the keys to my own house.