archaic  'ku' adjective (archaic)  adjective (generic)  noun  noun (generic)  な adjective 

• uneventful, peaceful, safe
• easy, simple
• having nothing to do

'ku' adjective (archaic)  adjective (generic) 

• unexpected
• regrettable
• easy
• without regrets

archaic  'ku' adjective (archaic)  adjective (generic) 

• faint, fleeting

archaic  'ku' adjective (archaic)  adjective (generic) 

• unspeakable, indescribable, inexpressible

archaic  'ku' adjective (archaic)  adjective (generic) 

• sharp
• intense, strong, powerful
• quick, rapid, fast
• keen, sharp, clever

archaic  'ku' adjective (archaic)  adjective (generic) 

• difficult, hard

rarely used kanji form  formal or literary term  usually written using kana alone  auxiliary  'ku' adjective (archaic)  adjective (generic)  auxiliary adjective 

• must, should, ought to
• will (surely), be bound to, must
• will (do), shall

obsolete reading  usually written using kana alone  'ku' adjective (archaic)  adjective (generic) 

• good, excellent, fine, nice, pleasant, agreeable