be overdue, be in arrears, back up, be stacked up

mind, heart, spirit, soul; thoughts, ideas / attention, mind, interest / heart, feelings, emotion, emotional state / wholeheartedness, sincerity, true heart

long / (time) long, lengthy

depressing / depressed

depression, gloom, melancholy

dense (growth); lush; luxuriant / accumulate; stagnate / depression; gloom; melancholy

(psychiatry) depression

chief, head, leader

strong point / (music) major / chief, head, leader

long / lengthy