earnest

/ˈər-nəst/

adjective

  1. characterized by or proceeding from an intense and serious state of mind

  2. grave, important

serious grave solemn sedate staid sober earnest mean not light or frivolous. serious implies a concern for what really matters. grave implies both seriousness and dignity in expression or attitude.

noun

  1. a serious and intent mental state

  2. a considerable or impressive degree or amount

a proposal made in earnest

noun

  1. something of value given by a buyer to a seller to bind a bargain

  2. a token of what is to come : pledge