signal

To indicate or make something known through an action or statement; to communicate something indirectly.

• signal/ˈsɪɡnəl/(n)信号；迹象
• signalling/ˈsɪɡnəlɪŋ/(n)信号传递

• signal a change
• signal intent
• signal support
• send a signal
• strong signal
• signal concern

1. 1.The appointment signals a clear shift in the organisation's strategic direction under new leadership.
2. 2.By raising interest rates, the central bank signalled its determination to bring inflation under control.

• indicate/ˈɪndɪkeɪt/— point to
• suggest/səˈdʒɛst/— imply
• communicate/kəˈmjuːnɪkeɪt/— convey information

from Medieval Latin "signale" = a sign, from Latin "signum" (mark, sign)