retain

To keep or continue to have something; to keep information in your memory.

• retention/rɪˈtɛnʃən/(n)保留；保持；记忆力
• retentive/rɪˈtɛntɪv/(adj)有记忆力的；保持性好的

• retain staff
• retain information
• retain the right to
• customer retention
• data retention
• retain control
• retain a lawyer

1. 1.High staff turnover is costly — it's often more economical to invest in retaining good employees than hiring new ones.
2. 2.The brain retains information more effectively when it is encountered in multiple different contexts.

• keep/kiːp/— continue to have
• maintain/meɪnˈteɪn/— keep in the same state
• preserve/prɪˈzɜːv/— keep from harm or change

from Latin "retinere" = to hold back, from "re-" (back) + "tenere" (to hold)