1. (adjective) showing curiosity

• questioning
• speculative
• wondering

1. (adjective) showing curiosity

• curious

2. (adjective) inquiring or appearing to inquire

• inquiring

1. (adjective) showing curiosity

• chew over
• contemplate
• excogitate
• meditate
• mull
• mull over
• muse
• ponder
• reflect
• ruminate
• speculate
• think over
• curiousness
• inquisitiveness
• enquire
• inquire
• wonder

2. (adjective) inquiring or appearing to inquire

• curiousness
• inquisitiveness
• enquire
• inquire
• wonder
• enquire
• inquire
• investigate