2 sentences

1. 他足足等了三个小时。

   tā zú​zú děng le sān gè xiǎo​shí.

   He waited for a full three hours.

   Source: Dong Chinese Dictionary

2. 这次准备工作做得足足的。

   zhè cì zhǔn​bèi gōng​zuò zuò de zú​zú de.

   The preparations this time were more than thorough.

   Source: Dong Chinese Dictionary