可擦写

• 口(mouth; opening)RADICAL
• 丁(man; adult male)PHONETIC

A mouth uttering words of approval with a sound like "ding" gives you the character meaning "can" or "able."

• 扌(hand; arm)RADICAL
• 察(examine; inspect)PHONETIC

Using your hand to wipe and scrub carefully as if you are examining each dirty mark closely.

• 冖(cover; roof)RADICAL
• 与(give; grant)ASSOCIATIVE

Writing characters means placing a brush under a roof to convey thoughts and intentions to others.