HARD, HARDNESS
ADJECTIVES
1200 — TOR difficult, hard, toilsome; irksome, tedious → obs.
1225 — DEAR → DERE hard, difficult → obs.
1225 — DERF troublesome, hard, difficult → obs.
1412 — DURE hard → arch.
1582 — FLINTED hard, cruel, unfeeling → obs.
1660 — ILL hard, difficult → Sc. & Eng. dial.
1666 — DUROUS hard → obs.
1791 — AIRNY hard or strong as iron → Sc.
1804 — DERF of things: hard, rough → Sc.
1882 — BAD difficult, hard → Eng. dial.
1887 — DERN hard, stern → Eng. dial.
1890 — TIGHT difficult, hard → Eng. dial.
1903 — HARD AS A DOOR-NAIL very hard → Eng. dial. (Bk.)
1903 — LIKE NAILS comparing anything very hard → Eng. dial. (Bk.)
1995 — BONE-BREAKING exceedingly hard, of work, etc. → US sl. (Bk.)
ADVERBS
1937 — CRUEL severely; extremely hard → UK sl.
1937 — CRUELLY severely; extremely hard → UK sl.
NOUNS
1543 — DURITY hardness, cruelty → obs.
..20C — BURLY a hard thing to accomplish → teen & high school sl.
..20C — WORKOUT a hard job; an exhausting effort → Amer. sl.
1950 — BALL-BUSTER a notably hard course or examination → US students’ sl.
1973 — ASS-KICK an exceedingly hard task → Amer. sl.
NOUNS, PERSON
1887 — NAILER a hard, grasping person → Eng. dial. (Bk.)
1888 — HARD NUT a hard or uncompromising person → sl.
1999 — NUTCRUSHER a hard man or woman; a strict disciplinarian → Brit. sl.
VERBS
1570 — WARISH to become hard or callous → obs.
Lexicophilia 