1. (

• refer ,
• pertain ,
• relate ,
• concern ,
• come_to ,
• bear_on ,
• touch ,
• touch_on ,
• have_to_do_with

) be relevant to; "There were lots of questions referring to her talk"; "My remark pertained to your earlier comments" ;

2. (

• concern ,
• interest ,
• occupy ,
• worry

) be on the mind of; "I worry about the second Germanic consonant shift" ;